FIG. 1.
Scheme for recycling of PG in E. coli. The enzymes and substrates are described in the text. Slt is the major soluble lytic transglycosylase. OM, outer membrane; PP, periplasm; IM, inner membrane. The enzymes involved in converting UDP-GlcNAc into the components of the PG and outer membrane are not shown. Arrows with a question mark indicate the pathways postulated to exist based on the results described in this work.