Candidate GTs for enzymatic synthesis (5 of 18 possible linkages):

PBP1A: E. coli , E. coli MC1061 PBP1B: E. coli K12 MG1655, E. coli

WbbL: E. coli K12 O16 Orf12: E. coli O39 WekH: E. coli O119 WfaL: E. coli O139

WfdI: E. coli O167

PBP1A: A. aeolicus PBP2: S. aureus PBP2A: E. faecalis

abMurG: A. baumannii