% Core-1 (GalNAc) and Core-2 (GalNAc-GlcNAc) are the most common GalNAc-initiated O-glycan cores
HexNAc(1)Hex(1) % mass of 365
HexNAc(1) % mass of 203.0794
HexNAc(2) % mass of 406.1587
HexNAc(2)Hex(1) % mass of 568.2116
HexNAc(1)Hex(1)NeuAc(1) % mass of 656.2276
HexNAc(1)Hex(1)NeuAc(2) % mass of 947.3230
HexNAc(2)Hex(2)NeuAc(1)  % 1021.36
HexNAc(2)Hex(2)NeuAc(2)  % 1312.455
HexNAc(1)Hex(1)NeuAc(3)  % 1238.418
