Candidate GTs for enzymatic synthesis (5 of 9 possible linkages):
| WaaX: E. coli R4 F2513 |
| WbwA: E. coli O104 |
| WcnV: E. coli O165 Orf7: E. coli O82 WclP: E. coli O21 |
| NeuS: E. coli K1, E. coli K92 |
| WfeD: E. coli O32 Orf6: E. coli O83 Orf9: E. coli O136 WbsG: E. coli O91 |