<meta charset="utf8"></head><body>基于 CRISPR 的水稻育种抗性淀粉高效基因组编辑

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<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>2 x Taq Plus Master Mix II</td>
			<td>Vazyme Biotech Co.,Ltd</td>
			<td>P213</td>
			<td>&#160;Detecting Single Nucleotide Polymorphism (SNP) of genes</td>
		</tr>
		<tr>
			<td>2,4-Dichlorophenoxyacetic (2,4-D) Acid Solutio</td>
			<td>Phyto Technology</td>
			<td>D309</td>
			<td></td>
		</tr>
		<tr>
			<td>AAM medium</td>
			<td>Shandong Tuopu Biol-engineering Co., Ltd</td>
			<td>M9051C</td>
			<td></td>
		</tr>
		<tr>
			<td>BsaI-HF</td>
			<td>New england biolabs</td>
			<td>R3535</td>
			<td>Bsa I enzyme digestion of the editing vector</td>
		</tr>
		<tr>
			<td>Carbenicillin antibiotics</td>
			<td>Applygen</td>
			<td>APC8250-5</td>
			<td>Selection&#160; medium, regeneration medium</td>
		</tr>
		<tr>
			<td>Casaminoacid</td>
			<td>BBI-Life SciencesCorporation</td>
			<td>A603060-0500</td>
			<td>Callus induction medium, co-cultivation medium, selection medium,regeneration medium</td>
		</tr>
		<tr>
			<td>DH5&#945; Chemically Competent Cell</td>
			<td>Weidi Biotechnology Co., Ltd.</td>
			<td>DL1001</td>
			<td>E. coli competent cells</td>
		</tr>
		<tr>
			<td>D-Sorbitol</td>
			<td>BBI-Life SciencesCorporation</td>
			<td>A610491-0500</td>
			<td></td>
		</tr>
		<tr>
			<td>EDTA,disodium salt,dihydrate</td>
			<td>Diamond</td>
			<td>A100105-0500</td>
			<td>CTAB buffer</td>
		</tr>
		<tr>
			<td>EHA105 Chemically Competent Cell</td>
			<td>Weidi Biotechnology Co., Ltd.</td>
			<td>AC1010</td>
			<td>Agrobacterium competent cells</td>
		</tr>
		<tr>
			<td>FastPure Plasmid Mini Kit</td>
			<td>Vazyme Biotech Co.,Ltd</td>
			<td>REC01-100</td>
			<td>Plasmid isolated</td>
		</tr>
		<tr>
			<td>Hygromycin antibiotics</td>
			<td>Yeasen</td>
			<td>60224ES</td>
			<td>co-cultivation medium, selection medium,regeneration medium and root medium</td>
		</tr>
		<tr>
			<td>Kanamycin antibiotics</td>
			<td>Yeasen</td>
			<td>60206ES10</td>
			<td>Selection agrobacterium</td>
		</tr>
		<tr>
			<td>KOH</td>
			<td>Macklin</td>
			<td>P766798</td>
			<td>CTAB buffer</td>
		</tr>
		<tr>
			<td>L-Glutamine</td>
			<td>Phyto Technology</td>
			<td>G229</td>
			<td>Callus induction medium, co-cultivation medium, selection medium,regeneration medium</td>
		</tr>
		<tr>
			<td>L-Proline</td>
			<td>Phyto Technology</td>
			<td>P698</td>
			<td>Callus induction medium, co-cultivation medium, selection medium,regeneration medium</td>
		</tr>
		<tr>
			<td>Mautre dry rice seeds (Xiushui134)</td>
			<td>-</td>
			<td>-</td>
			<td>Japonica varieties for breeding RS rice</td>
		</tr>
		<tr>
			<td>Mill rice mechine</td>
			<td>MARUMASU</td>
			<td>MHR1500A</td>
			<td>To produce white rice</td>
		</tr>
		<tr>
			<td>Murashige Skoog</td>
			<td>Phyto Technology</td>
			<td>M519</td>
			<td>Root medium, regeneration medium</td>
		</tr>
		<tr>
			<td>Myo-inositol</td>
			<td>Phyto Technology</td>
			<td>I703</td>
			<td>Regeneration medium</td>
		</tr>
		<tr>
			<td>NaCl</td>
			<td>Macklin</td>
			<td>S805275</td>
			<td>For&#160; YEP media</td>
		</tr>
		<tr>
			<td>NB Basal Medium</td>
			<td>Phyto Technology</td>
			<td>N492</td>
			<td>Callus induction medium, co-cultivation medium, selection medium,regeneration medium</td>
		</tr>
		<tr>
			<td>Peptone&#160;</td>
			<td>Solarbio</td>
			<td>LA8800</td>
			<td>For&#160; YEP media</td>
		</tr>
		<tr>
			<td>Phytogel</td>
			<td>Shanghai yuanye Bio-Technology Co., Ltd</td>
			<td>S24793</td>
			<td></td>
		</tr>
		<tr>
			<td>Pot&#160;</td>
			<td>Midea group Co.</td>
			<td>MB-5E86</td>
			<td>For cooking rice</td>
		</tr>
		<tr>
			<td>Refrigerator</td>
			<td>Haier</td>
			<td>BCD-170</td>
			<td>Storage the medium</td>
		</tr>
		<tr>
			<td>Resistant Starch Assay Kit</td>
			<td>Megazyme</td>
			<td>K-RSTAR</td>
			<td>Measurement and analysis resistant starch</td>
		</tr>
		<tr>
			<td>Rifampicin antibiotics</td>
			<td>Sigma</td>
			<td>R3501-250MG</td>
			<td>Selection agrobacterium</td>
		</tr>
		<tr>
			<td>Sodium hypochlorite solution</td>
			<td>Macklin</td>
			<td>S817439</td>
			<td>For seed sterilization</td>
		</tr>
		<tr>
			<td>Sucrose</td>
			<td>Shanghai yuanye Bio-Technology Co., Ltd</td>
			<td>B21647</td>
			<td>Callus induction medium, co-cultivation medium, selection medium,regeneration medium</td>
		</tr>
		<tr>
			<td>T4 DNA Ligase</td>
			<td>New england biolabs</td>
			<td>M0202</td>
			<td>Joining sgRNA to the CEISPRY/Cas-SF01 vector</td>
		</tr>
		<tr>
			<td>The glucose monitor</td>
			<td>Medical Equipment &#38; Supply Co., Ltd</td>
			<td>Xuetang 582</td>
			<td>Detection the blood glucose</td>
		</tr>
		<tr>
			<td>Tris-HCL</td>
			<td>Macklin</td>
			<td>T766494</td>
			<td>CTAB buffer</td>
		</tr>
		<tr>
			<td>Yeast Agar</td>
			<td>Solarbio</td>
			<td>LA1370</td>
			<td>For&#160; YEP media</td>
		</tr>
		<tr>
			<td>YEP media</td>
			<td>-</td>
			<td>-</td>
			<td>Cultivation of Agrobacterium</td>
		</tr>
	</tbody>
</table>

breeding by design for functional rice with genome editing technologies

<meta charset="utf8"></head><body>作者聚焦：使用 CRISPR/Cas 简化水稻育种以获得最佳表型和农艺性状

利用基因组编辑技术为功能性水稻设计育种

The conventional approaches to crop breeding, which rely predominantly on time-consuming and labor-intensive methods such as traditional hybridization and ...

breeding-design-for-functional-rice-with-genome-editing

Research

JoVE Journal

Bioengineering

Breeding by Design for Functional Rice with Genome Editing Technologies

1.9K 次观看.  Bellagen Biotechnology Co. Ltd. 我们正在努力培育具有基因组编辑技术的功能稻。我们的研究不仅仅是应用基因编辑工具。相反，它侧重于多个方面的整合，从基因选择和编辑工具优化到详细的表型和农艺性状分析。我们已经超越了简单地证明在水稻中编辑 SBEIIb 基因的可行性。我们的工作全面评估了该编辑器对编辑水稻的生化、分子和农艺性状的影响。我们的实验室未来将?...

视频: 作者聚焦：使用 CRISPR/Cas 简化水稻育种以获得最佳表型和农艺性状 

Polymeric Microneedle Array Fabrication by Photolithography

This manuscript describes the fabrication of polymeric microneedle (MN) arrays by photolithography. It involves a simple mold-free process by using a photomask consisting of embedded micro-lenses. Embedded micro-lenses were found to influence MN geometry (sharpness). Robust MN arrays with tip diameters ranging between 41.5 &#181;m &#177; 8.4 &#181;m and 71.6 &#181;m &#177; 13.7 &#181;m, with two different lengths (1,336 &#181;m &#177; 193 &#181;m and 957 &#181;m &#177; 171 &#181;m) were fabricated. These MN arrays may provide potential applications in delivery of low molecular and macromolecular therapeutic agents through skin.

Here, we present a protocol describing a mold-free fabrication process of the polymeric microneedles by photolithography.

聚合物微针阵列制造用光刻

This manuscript describes the fabrication of polymeric microneedle (MN) arrays by photolithography. It involves a simple mold-free process by using a ...

科研

生物工程

In Situ Mapping of the Mechanical Properties of Biofilms by Particle-tracking Microrheology

Bacterial cells are able to form surface-attached biofilm communities known as biofilms by encasing themselves in extracellular polymeric substances (EPS). The EPS serves as a physical and protective scaffold that houses the bacterial cells and consists of a variety of materials that includes proteins, exopolysaccharides and DNA. The composition of the EPS may change, which remodels the mechanic properties of the biofilm to further develop or support alternative biofilm structures, such as streamers, as a response to environmental cues. Despite this, there are little quantitative descriptions on how EPS components contribute to the mechanical properties and function of biofilms. Rheology, the study of the flow of matter, is of particular relevance to biofilms as many biofilms grow in flow conditions and are constantly exposed to shear stress. It also provides measurement and insight on the spreading of the biofilm on a surface. Here, particle-tracking microrheology is used to examine the viscoelasticity and effective crosslinking roles of different matrix components in various parts of the biofilm during development. This approach allows researchers to measure mechanic properties of biofilms at the micro-scale, which might provide useful information for controlling and engineering biofilms.

In Situ Mapping of the Mechanical Properties of Biofilms by Particle-tracking Microrheology

Particle-tracking microrheology investigates the viscoelasticity of materials. Here, the technique is used to determine the viscoelasticity, creep compliance and effective crosslinking roles of different matrix components of a bacterial biofilm. The matrix consists of polymeric substances secreted by the bacteria and its components determine biofilm structure and mechanical properties.

在生物膜的力学性能原位制图粒子追踪Microrheology

Bacterial cells are able to form surface-attached biofilm communities known as biofilms by encasing themselves in extracellular polymeric substances ...

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites

LCEs are shape-responsive materials with fully reversible shape change and potential applications in medicine, tissue engineering, artificial muscles, and as soft robots. Here, we demonstrate the preparation of shape-responsive liquid crystal elastomers (LCEs) and LCE nanocomposites along with characterization of their shape-responsiveness, mechanical properties, and microstructure. Two types of LCEs &#8212; polysiloxane-based and epoxy-based &#8212; are synthesized, aligned, and characterized. Polysiloxane-based LCEs are prepared through two crosslinking steps, the second under an applied load, resulting in monodomain LCEs. Polysiloxane LCE nanocomposites are prepared through the addition of conductive carbon black nanoparticles, both throughout the bulk of the LCE and to the LCE surface. Epoxy-based LCEs are prepared through a reversible esterification reaction. Epoxy-based LCEs are aligned through the application of a uniaxial load at elevated (160 &#176;C) temperatures. Aligned LCEs and LCE nanocomposites are characterized with respect to reversible strain, mechanical stiffness, and liquid crystal ordering using a combination of imaging, two-dimensional X-ray diffraction measurements, differential scanning calorimetry, and dynamic mechanical analysis. LCEs and LCE nanocomposites can be stimulated with heat and/or electrical potential to controllably generate strains in cell culture media, and we demonstrate the application of LCEs as shape-responsive substrates for cell culture using a custom-made apparatus.

We demonstrate the preparation of siloxane-based and epoxy-based liquid crystal elastomers (LCEs) and LCE nanocomposites. The LCEs are characterized with respect to reversible strain, liquid crystal ordering, and stiffness. As a potential application, we demonstrate their use as shape-responsive substrates in a custom device for active cell culture.

单域液晶的弹性体和液晶橡胶纳米复合材料的制备

LCEs are shape-responsive materials with fully reversible shape change and potential applications in medicine, tissue engineering, artificial muscles, and ...

Anatomically Realistic Neonatal Heart Model for Use in Neonatal Patient Simulators

Neonatal patient simulators (NPS) are artificial patient surrogates used in the context of medical simulation training. Neonatologists and nursing staff practice clinical interventions such as chest compressions to ensure patient survival in the case of bradycardia or cardiac arrest. The simulators used currently are of low physical fidelity and therefore cannot provide qualitative insight into the procedure of chest compressions. The embedding of an anatomically realistic heart model in future simulators enables the detection of cardiac output generated during chest compressions; this can provide clinicians with an output parameter, which can deepen the understanding of the effect of the compressions in relation to the amount of blood flow generated. Before this monitoring can be achieved, an anatomically realistic heart model must be created containing: two atria, two ventricles, four heart valves, pulmonary veins and arteries, and systemic veins and arteries. This protocol describes the procedure for creating such a functional artificial neonatal heart model by utilizing a combination of magnetic resonance imaging (MRI), 3D printing, and casting in the form of cold injection molding. Using this method with flexible 3D printed inner molds in the injection molding process, an anatomically realistic heart model can be obtained.

This protocol describes a procedure for creating functional artificial neonatal heart models by utilizing a combination of magnetic resonance imaging, 3D printing, and injection molding. The purpose of these models is for integration into the next generation of neonatal patient simulators and as a tool for physiological and anatomical studies.

在新生儿患者模拟器中使用的解剖现实新生儿心脏模型

Neonatal patient simulators (NPS) are artificial patient surrogates used in the context of medical simulation training. Neonatologists and nursing staff ...

Outer-Boundary Assisted Segmentation and Quantification of Trabecular Bones by an Imagej Plugin

Micro-computed tomography (micro-CT) is routinely used to assess bone quantity and trabecular microstructural properties in small animals under different bone loss conditions. However, the standard approach for trabecular analysis of micro-CT images is slice-by-slice semi-automatic hand-contouring, which is labor intensive and error prone. Described here is an efficient method for automatic segmentation of trabecular bones according to the bone's outer boundaries, where trabecular bones can be identified and segmented automatically with accuracy with less operator bias when appropriate segmentation parameters are set. To profile satisfactory segmentation parameters, an image stack of segmentation results is displayed, where all possible combinations of the segmentation parameters are changed one by one in sequence, and segmentation results with associated parameters can easily be visually checked. As a quality-control feature of the plugin, simulated standard objects are quantified where the measured quantities can be compared with theoretical values. Layer-by-layer quantification of trabecular properties and trabecular thicknesses are reported by such a plugin, and the distributions of such properties within the selected regions can be profiled easily. Although layer-by-layer quantification retains more information about trabecular bones and facilitates further statistical analysis of structural changes, such measures are unavailable from the output of current commercial software, where only a single quantified value for each parameter is reported for each sample. Therefore, the described workflows are better approaches for analyzing trabecular bones with accuracy and efficiency.

We present a workflow for segmenting and quantifying trabecular bones for 2D and 3D images based on the bone&#39;s outer boundary using an ImageJ plugin. This approach is more efficient and accurate than the current manual hand-contouring approach, and provides layer-by-layer quantifications, which are not available in current commercial software.

用 Imagej 插件对小梁骨的外边界辅助分割和量化

Micro-computed tomography (micro-CT) is routinely used to assess bone quantity and trabecular microstructural properties in small animals under different ...

Microinjection of Western Corn Rootworm, Diabrotica virgifera virgifera, Embryos for Germline Transformation, or CRISPR/Cas9 Genome Editing

The western corn rootworm (WCR) is an important pest of corn and is well known for its ability to rapidly adapt to pest management strategies. Although RNA interference (RNAi) has proved to be a powerful tool for studying WCR biology, it has its limitations. Specifically, RNAi itself is transient (i.e. does not result in long-term Mendelian inheritance of the associated phenotype), and it requires knowing the DNA sequence of the target gene. The latter can be limiting if the phenotype of interest is controlled by poorly conserved, or even novel genes, because identifying useful targets would be challenging, if not impossible. Therefore, the number of tools in WCR&#39;s genomic toolbox should be expanded by the development of methods that could be used to create stable mutant strains and enable sequence-independent surveys of the WCR genome. Herein, we detail the methods used to collect and microinject precellular WCR embryos with nucleic acids. While the protocols described herein are aimed at the creation of transgenic WCR, CRISPR/Cas9-genome editing could also be performed using the same protocols, with the only difference being the composition of the solution injected into the embryos.

Microinjection of Western Corn Rootworm, Diabrotica virgifera virgifera, Embryos for Germline Transformation, or CRISPR/Cas9 Genome Editing

Here we present protocols for collecting and microinjecting precellular western corn rootworm embryos for the purpose of performing functional-genomic assays such as germline transformation and CRISPR/Cas9-genome editing.

对西方玉米 Rootworm、 Diabrotica virgifera virgifera、生殖转化胚胎或 CRISPR/Cas9 基因组编辑的显微注射

The western corn rootworm (WCR) is an important pest of corn and is well known for its ability to rapidly adapt to pest management strategies. Although ...

Methanol Independent Expression by Pichia Pastoris Employing De-repression Technologies

Methanol is a well-established carbon source and inducer for efficient protein production employing Pichia pastoris (P. pastoris) as a host on micro-, lab and industrial scale. However, due to its toxicity and flammability, there is a desire to avoid methanol while maintaining the high productivity of P. pastoris. Small scale bioreactor cultivations (0.5-5 L working volume) are commonly used to evaluate a strain and its protein production characteristics since microscale cultivation in deep well plates can be hardly controlled or relies on expensive equipment. Furthermore, traditional protocols for the cultivation and induction of P. pastoris were established for constitutive expression or methanol induction and so far, no reliable protocols were described to screen P. pastoris expression strains with derepressible promoters in (controlled and monitored) parallel cultivations. To simplify such initial cultivations to characterize and compare new protein production strains, we established a simple shake flask cultivation system for methanol free expression that simulates bioreactor conditions including a constant slow glycerol feed and online monitoring, thereby coming closer to the real conditions in bioreactors compared to mostly applied small scale batch cultivations. To drive recombinant protein expression in P. pastoris, the carbon source repressed promoters PDC and PDF were applied. Polymer discs with embedded carbon source, releasing a constant amount of glycerol, assured a feed rate delivering the necessary energy for maintaining the promoters active while keeping the biomass generation low.

Methanol Independent Expression by Pichia Pastoris Employing De-repression Technologies

This method for the first time describes reliable experimental procedures for efficient inducible methanol-free recombinant protein production in Pichia pastoris (Komagataella phaffii), employing the carbon source regulated promoters PDCand PDF in small scale experiments while cultivation parameters can be monitored online, and a constant glycerol feed is applied.

多夏巴氏杆菌自主表达采用除抑制技术

Methanol is a well-established carbon source and inducer for efficient protein production employing Pichia pastoris (P. pastoris) as a host on micro-, lab ...

Detection of Endotoxin in Nano-formulations Using Limulus Amoebocyte Lysate (LAL) Assays

When present in pharmaceutical products, a Gram-negative bacterial cell wall component endotoxin (often also called lipopolysaccharide) can cause inflammation, fever, hypo- or hypertension, and, in extreme cases, can lead to tissue and organ damage that may become fatal. The amounts of endotoxin in pharmaceutical products, therefore, are strictly regulated. Among the methods available for endotoxin detection and quantification, the Limulus Amoebocyte Lysate (LAL) assay is commonly used worldwide. While any pharmaceutical product can interfere with the LAL assay, nano-formulations represent a particular challenge due to their complexity. The purpose of this paper is to provide a practical guide to researchers inexperienced in estimating endotoxins in engineered nanomaterials and nanoparticle-formulated drugs. Herein, practical recommendations for performing three LAL formats including turbidity, chromogenic and gel-clot assays are discussed. These assays can be used to determine endotoxin contamination in nanotechnology-based drug products, vaccines, and adjuvants.

Detection of Endotoxin in Nano-formulations Using Limulus Amoebocyte Lysate LAL Assays

Detection of endotoxins in engineered nanomaterials represents one of the grand challenges in the field of nanomedicine. Here, we present a case study that describes the framework composed of three different LAL formats to estimate potential endotoxin contamination in nanoparticles.

用利穆鲁布莱巴细胞裂解液 (lal) 法检测纳米配方中的内毒素

When present in pharmaceutical products, a Gram-negative bacterial cell wall component endotoxin (often also called lipopolysaccharide) can cause ...

Ultra-long Read Sequencing for Whole Genomic DNA Analysis

Third generation single-molecule DNA sequencing technologies offer significantly longer read length that can facilitate the assembly of complex genomes and analysis of complex structural variants. Nanopore platforms perform single-molecule sequencing by directly measuring the current changes mediated by DNA passage through the pores and can generate hundreds of kilobase (kb) reads with minimal capital cost. This platform has been adopted by many researchers for a variety of applications. Achieving longer sequencing read lengths is the most critical factor to leverage the value of nanopore sequencing platforms. To generate ultra-long reads, special consideration is required to avoid DNA breakages and gain efficiency to generate productive sequencing templates. Here, we provide the detailed protocol of ultra-long DNA sequencing including high molecular weight (HMW) DNA extraction from fresh or frozen cells, library construction by mechanical shearing or transposase fragmentation, and sequencing on a nanopore device. From 20-25 &#181;g of HMW DNA, the method can achieve N50 read length of 50-70 kb with mechanical shearing and N50 of 90-100 kb read length with transposase mediated fragmentation. The protocol can be applied to DNA extracted from mammalian cells to perform whole genome sequencing for the detection of structural variants and genome assembly. Additional improvements on the DNA extraction and enzymatic reactions will further increase the read length and expand its utility.

Long-read sequences greatly facilitate the assembly of complex genomes and characterization of structural variation. We describe a method to generate ultra-long sequences by nanopore-based sequencing platforms. The approach adopts an optimized DNA extraction followed by modified library preparations to generate hundreds of kilobase reads with moderate coverage from human cells.

用于全基因组 DNA 分析的超长读数测序

Third generation single-molecule DNA sequencing technologies offer significantly longer read length that can facilitate the assembly of complex genomes ...

CRISPR/Cas12a Multiplex Genome Editing of Saccharomyces cerevisiae and the Creation of Yeast Pixel Art

High efficiency, ease of use and versatility of the clustered regularly interspaced short palindromic repeats/CRISPR-associated protein 9 (CRISPR/Cas9) system has facilitated advanced genetic modification of Saccharomyces cerevisiae, a model organism and workhorse in industrial biotechnology. CRISPR-associated protein 12a (Cas12a), an RNA-guided endonuclease with features distinguishable from Cas9 is applied in this work, further extending the molecular toolbox for genome editing purposes. A benefit of the CRISPR/Cas12a system is that it can be used in multiplex genome editing with multiple guide RNAs expressed from a single transcriptional unit (single CRISPR RNA (crRNA) array). We present a protocol for multiplex integration of multiple heterologous genes into independent loci of the S. cerevisiae genome using the CRISPR/Cas12a system with multiple crRNAs expressed from a single crRNA array construct. The proposed method exploits the ability of S. cerevisiae to perform in vivo recombination of DNA fragments to assemble the single crRNA array into a plasmid that can be used for transformant selection, as well as the assembly of donor DNA sequences that integrate into the genome at intended positions. Cas12a is pre-expressed constitutively, facilitating cleavage of the S.&#160;cerevisiae genome at the intended positions upon expression of the single crRNA array. The protocol includes the design and construction of a single crRNA array and donor DNA expression cassettes, and exploits an integration approach making use of unique 50-bp DNA connectors sequences and separate integration flank DNA sequences, which simplifies experimental design through standardization and modularization and extends the range of applications. Finally, we demonstrate a straightforward technique for creating yeast pixel art with an acoustic liquid handler using differently colored carotenoid producing yeast strains that were constructed.

CRISPR/Cas12a Multiplex Genome Editing of Saccharomyces cerevisiae and the Creation of Yeast Pixel Art

The CRISPR/Cas12a system in combination with a single crRNA array enables efficient multiplex editing of the S.&#160;cerevisiae genome at multiple loci simultaneously. This is demonstrated by constructing carotenoid producing yeast strains which are subsequently used to create yeast pixel art.

CRISPR/Cas12a 多路复用基因组编辑糖母细胞和酵母像素艺术的创作

High efficiency, ease of use and versatility of the clustered regularly interspaced short palindromic repeats/CRISPR-associated protein 9 (CRISPR/Cas9) ...