Candidate GTs for enzymatic synthesis (5 of 15 possible linkages):
ktr4p: S. cerevisiae S288c
RfaC: E. coli K12
WaaA: E. coli K12
WzY: E. coli O137
LpxB: E. coli
WffD: E. coli O58
WejN: E. coli O78