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. Author manuscript; available in PMC: 2010 Apr 1.
Published in final edited form as: Chem Rev. 2009 Apr;109(4):1599–1612. doi: 10.1021/cr8004197

Figure 5.

Figure 5

Bacillus subtilisS2P-like protease SpoIVFB and sporulation. Upon engulfment of the forespore by the mother cell, a signaling pathway involving the transcription factor σG is initiated in the forespore that triggers the synthesis of the IVB serine protease. This protease degrades SpoIVFA, which along with BofA serves to inhibit SpoIVFB. With the inhibition of the S2P-like protease released, SpoIVFB cleaves pro-σK, allowing this transcription factor to signal in the mother cell for further factors needed for spore maturation.