Abstract
A polysaccharide isolated from cultures of Nocardia asteroides contained arabinose and galactose in a molar ratio of 1.7:1. The two monosaccharides were unequivocally identified as D-arabinose and D-galactose by isolating them in crystalline form. Partial hydrolysis showed that some of the D-arabinose units in the polysaccharide were in the furanoside ring form while the D-galactose units possessed the pyranoside structure. Methylation studies showed that the polysaccharide was a branched structure of D-arabinose and D-galactose units with some of the arabinose forming non-reducing, terminal residues. The findings reported here are regarded as further evidence of the close, taxonomic relationship between Nocardia asteroides and Mycobacterium tuberculosis, members of the same order.
Publisher
Canadian Science Publishing
Subject
Genetics,Molecular Biology,Applied Microbiology and Biotechnology,General Medicine,Immunology,Microbiology
Cited by
17 articles.
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