This method can help answer key questions in the antimicrobial peptide field about whether peptides localize to or trans locate across the cell membrane. Using spheroplasts and protoplasts allows the visualization and analysis of peptide localizat
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Here we present a protocol to produce gram-negative Escherichia coli (E. coli) spheroplasts and gram-positive Bacillus megaterium (B. megaterium) protoplasts to clearly visualize and rapidly characterize peptide-bacteria interactions. This provides a systematic method to define membrane localizing and translocating peptides.