Candidate GTs for enzymatic synthesis (2 of 3 possible linkages):
81A1:
A. thaliana
WaaL:
E. coli
K12
Subst // Subst = NBD-ceramide (6-{[(N-7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino]caproyl}sphingosine))
Subst3 // Subst1 = O7 antigen; Subst3 = lipid A-core)