Ovalbumin difference spectra

From the spectrum of this complex mixture of glycopeptides, it may be inferred that all of the constituents have, in common, Man residues 3, 4, 4, A, and B, and the N,N -diacetylchitobiose unit. [The smallest component of this mixture differs from 63 (ov), obtained from ovalbumin, only in the peptide part.] The N-acetyl signals of GlcNAc-1 and -2 are both split into two singlets this reflects the heterogeneity of the peptide moiety. Nevertheless, the chemical shift of the N-acetyl signal of GlcNAc-2 (8 —2.055) is typical for extension of the core pentasaccharide with Man residues only [compare 61, 62, 63 (ov), and 67 see Tables XXIV and XXV],... 

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