Modified model of CcpA-mediated repression of gal operon expression in S. oligofermentans. Details are provided in Discussion. FBP, fructose-1,6-bisphosphate. manL encodes the A and B components of EIIMan. EIIABC encodes the A, B, and C components of galactitol-specific PTS permease, denoted EIIGal, which is part of the gal operon. Adapted by permission from Macmillan Publishers Ltd. 13.