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The mechanism of competence and sporulation factor (CSF) production from phrC gene. The phrC encodes a pre-pro-peptide, the yellow portion of which represents signal sequence, the black portion of which represents secreted non-signaling peptide sequence, and the Green portion of which represent the mature signaling peptide sequence. The signaling sequence is cut off and the pro-CSF is exported outside of the cell where a protease cuts the pro-CSF and transforms it into active CSF.
