Chapter 35
Cell Division
الانقسام والحركية الخلوية
In eukaryotes, the cell division cycle is divided into distinct, coordinated cellular processes that include cell growth, DNA replication/chromosome ...
ازدواجية الكروموسوم
The process of chromosome duplication during cell division requires genome-wide disruption and re-assembly of chromatin. The chromatin structure must be ...
التماسك
Cohesin protein complexes are a molecular glue that holds two sister chromatids together. They play an important role both in mitosis and meiosis. In ...
المكثفات
Condensins are large protein complexes that use ATP to fuel the assembly of chromosomes during mitosis. They transform the tangled, shapeless mass of ...
المغزل الانقسامي
The mitotic spindle—or spindle apparatus—is a eukaryotic, cytoskeletal structure made up of long protein fibers called microtubules. Formed ...
ازدواجية الجسيم المركزي
The primary microtubule organizing center (MTOC) in animal cells is the centrosome. A centrosome has two cylindrical centrioles at its core. Each ...
مجموعة المغزل
Spindle assembly occurs through three, often coexisting, pathways – the centrosome-mediated pathway, the chromatin-mediated pathway, and the ...
مرفق الكروماتيدات الشقيقة
As cells progress into mitosis, the nuclear envelope breaks down, and the condensed chromosomes are exposed to the array of bipolar microtubules of the ...
القوى المؤثرة على الكروموسومات
During mitosis, chromosome movements occur through the interplay of multiple piconewton level forces. In prometaphase, these forces help in chromosome ...
فصل الكروماتيدات الشقيقة
At the transition from prophase to metaphase, there is a reduction in cohesion along the chromosomal arms, resulting in the resolution of sister ...
نقطة تفتيش تجميع المغزل
The spindle assembly checkpoint is a molecular surveillance mechanism ensuring the fidelity of chromosome segregation during anaphase. The checkpoint ...
الطور A و B
Microtubules form through the end-to-end polymerization of tubulin heterodimers. Kinetochore microtubules originate from the spindle poles, and their ...
مجمع تعزيز Anaphase
The stepwise destruction of specific proteins is necessary for the progression and completion of the cell cycle. Such proteins are ubiquitinated by ...
الحلقة الانقباضية
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly ...
تحديد مستوى انقسام الخلايا
Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is ...
فراغموبلاست
Cell division is essential for organismal growth and development. In animal cells, the central spindle and its associated proteins form the midbody, a ...
توزيع المحتوى السيتوبلازمي
Cytokinesis segregates a cell’s chromosomes and organelles into its daughter cells. Organelles divide and grow prior to cell division but cannot be ...
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