ID 2.7.8.21 DE membrane-oligosaccharide glycerophosphotransferase. AN periplasmic phosphoglycerotransferase. AN phosphoglycerol cyclase. CA Transfer of a glycerophospho group from one membrane-derived CA oligosaccharide to another. CC -!- beta-linked glucose residues in simple glucosides, such as CC gentiobiose, can act as acceptors. CC -!- In the presence of low concentrations of acceptor, free cyclic 1,2- CC phosphoglycerol is formed. //