Candidate GTs for enzymatic synthesis (2 of 7 possible linkages):

WcnV: E. coli O165 Orf7: E. coli O82 WclP: E. coli O21

WfeD: E. coli O32 Orf6: E. coli O83 Orf9: E. coli O136 WbsG: E. coli O91