Biosynthesis of the cell wall. The following metabolic intermediates that occur in other pathways are labeled in blue: pyruvate (Fig. 3, 4, 8, and 9), glyceraldehyde-3-phosphate (GAP) (Fig. 3 and 7), isopentenyl pyrophosphate (isopentenyl-PP) (this figure), farnesyl pyrophosphate (farnesyl-PP) (Fig. 8), undecaprenyl phosphate (Fig. 11), fructose-6-phosphate (Fig. 3), acetyl-CoA (Fig. 3 and 6), UDP-N-acetylglucosamine (UDP-GlcNAc) (Fig. 11), phosphoenol pyrophosphate (PEP) (Fig. 3 and 4), and acetate (Fig. 3). UDP-MurNAc, UDP-N-acetylmuramic acid; DAP, diaminopimelate.