The molecule is a mannopentaose comprised of an linear chain of four alpha-D-mannose residues, linked sequentially (1->2), (1->2) and (1->6), to the reducing-end residue of which is also linked (1->3) a fifth alpha-D-mannose. It has a role as an epitope.
(2R,3S,4S,5S,6R)-2-[(2R,3R,4S,5S,6S)-2-[[(2S,3S,4S,5S,6R)-3-[(2R,3S,4S,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-3-[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]-3,5,6-trihydroxyoxan-4-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol