Mucus glycoproteins from bovine seminal plasma were demonstrated to express the MAbs CC49- and B72.3-defined epitopes on TAG 72 antigen. Inhibition studies with reductively cleaved mucin O-glycans from bovine seminal plasma and submaxillary glands revealed that CC49 binds specifically to a core-type sialyl-oligosaccharide alditol (fraction 2c), which could be defined with regard to its primary structure by FAB- and EI-mass spectrometry combined with methylation analysis: (formula; see text) Structurally related alditols NeuAc alpha(2-6)-GalNAc-ol, Gal beta(1-3)GalNAc-ol, NeuAc alpha(2-3)-Gal beta(1-3) [NeuAc alpha(2-6)] GalNAc-ol, GlcNAc beta(1-3) [NeuAc alpha(2-6)] GalNAc-ol or NeuAc alpha(2-3) Gal beta(1-3)GalNAc-ol were not inhibitory.
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Hanisch et al. (1989) studied this question.
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