Also known as LPXB_BURP6, lpxB. Condensation of UDP-2, 3-diacylglucosamine and 2, 3-diacylglucosamine-1-phosphate to form lipid A disaccharide, a precursor of lipid A, a phosphorylated glycolipid that anchors the lipopolysaccharide to the outer membrane of the cell.
