label: Brucella O-antigen
label_lc: brucella o-antigen
description: "A diblock copolymer in which one block consists of tetrasaccharide components comprising N-formyl-alpha-D-perosamine residues linked sequentially (1->2), (1->3) and (1->2) [alpha-D-Rhap4NFo-(1->2)-alpha-D-Rhap4NFo-(1->3)-alpha-D-Rhap4NFo-(1->2)-alpha-D-Rhap4NFo], with the second block consisting of N-formyl-alpha-D-perosamine residues linked solely (1->2). The percentage of (1->3) linkages compared with (1->2) ranges from 1% to 20% in different Brucella biovars."