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. 2012 Jun 6;69(24):4135–4147. doi: 10.1007/s00018-012-1036-z

Fig. 1.

Fig. 1

Structure of HNK-1 epitope and biosynthetic enzymes. a Structure of HNK-1 and the enzymes that biosynthesize it. b Structure of the proteoglycan linkage tetrasaccharide. Sulfation of this glycan by HNK-1ST may be an off-switch for further biosynthesis of glycosaminoglycan