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. Author manuscript; available in PMC: 2014 Apr 28.
Published in final edited form as: Biochim Biophys Acta. 2013 Apr 8;1830(8):4274–4281. doi: 10.1016/j.bbagen.2013.04.001

Fig. 1.

Fig. 1

Synthesis of the common O-glycan core structures 1 to 4. C1GalT and C3GnT both act on GalNAc-substrates to synthesize core 1 and core 3, respectively. Core 1 is branched by either C2GnT1 or C2GnT2 to form core 2. Core 3 is branched only by C2GnT2 to form core 4. Core 1–4 structures can be extended and terminated in many different ways.