Summary of mouse serum N-glycome.

1Various ions:aSingly charged ion ([M+H2PO4]−),bSingly charged ion ([M-H]−),cSodium salt,dDoubly charged ion ([M-2H]2−),eDoubly charged ion ([M-H+H2PO4]2−),fDi-sodium salt.2All N-glycans have two core GlcNAcs; Mx = high-mannose where x = the number of mannose residues, D = substitution position of high-mannose glycans, Ax = number of antennae, Gx = number of galactose residues, Sx = number of sialic acids, F = core fucose. The linkage positions of the galactose and sialic acid residues are given in parentheses (Royle et al[19]).