Key points are not available for this paper at this time.
Abstract Two major components of pineapple bromelain, purified to electrophoretical homogeneity, appeared to have the same oligosaccharide group consisting of d-glucosamine, d-mannose, d-xylose, and l-fucose in ratios of 2:2:1:1. By exhaustive proteolysis of the bromelains, glycopeptides containing only Asx, Glx, and Ser were obtained. Periodate oxidation, methylation, and glycosidase digestion showed that the oligosaccharide chain has a highly branched structure in which all the neutral sugars are in nonreducing terminal positions and both N-acetyl-d-glucosamine residues occur in internal positions.
Scocca et al. (1969) studied this question.