Candidate GTs for enzymatic synthesis (5 of 7 possible linkages):

WbbA: E. coli O7:K1 VW187 WbbB: E. coli O7 Orf9: E. coli O39

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

WcaO: E. coli O9a:K30 Orf8: E. coli O39

WzY: E. coli O7:K1 VW187

Orf11: E. coli O39