ID 2.4.1.380 DE GDP-Man:alpha-D-Man-(1->3)-alpha-D-Gal diphosphoundecaprenol alpha-1,2- DE mannosyltransferase. CA alpha-D-mannosyl-(1->3)-alpha-D-galactosyl-diphospho-di-trans,octa- CA cis-undecaprenol + GDP-alpha-D-mannose = alpha-D-Man-(1->2)-alpha-D-Man- CA (1->3)-alpha-D-Gal-di-trans,octa-cis-undecaprenyl diphosphate + GDP + CA H(+). CC -!- The enzyme, present in Salmonella strains that belong to group C2, CC participates in the biosynthesis of the repeat unit of O antigens CC produced by these strains. //