DSRB is a novel dextransucrase which produces a dextran different from the typical dextran, as it contains (1-6) and (1-2) linkages, when this strain is grown in the presence of sucrose [1].

1: Cloning and sequencing of a gene coding for an extracellular dextransucrase (DSRB) from Leuconostoc mesenteroides NRRL B-1299 synthesizing only a alpha (1-6) glucan. Monchois V, Remaud-Simeon M, Monsan P, Willemot RM; FEMS Microbiol Lett. 1998;159:307-315. PMID:9503626