The Journal of Experimental Medicine
BioLegend: PerCP, PerCP/Cy5.5 Ab Conjugates
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The Journal of Experimental Medicine, Vol 115, 49-62, Copyright, 1962, by The Rockefeller Institute

ARTICLE

STUDIES ON THE CHEMICAL STRUCTURE OF THE STREPTOCOCCAL CELL WALL : II. THE COMPOSITION OF GROUP C CELL WALLS AND CHEMICAL BASIS FOR SEROLOGIC SPECIFICITY OF THE CARBOHYDRATE MOIETY



Richard M. Krause M.D.1 and Maclyn McCarty M.D.1

1 From The Rockefeller Institute

The trypsinized cell walls of Group C streptococci contain two components, the group-specific carbohydrate and a mucopeptide polymer. Hot formamide extraction of Group C cell walls results in a soluble group-specific carbohydrate fraction and an insoluble mucopeptide residue. This mucopeptide, similar in composition to that of Groups A and A-variant streptococci, contains N-acetylglucosamine, N-acetylmuramic acid, alanine, glutamic acid, lysine, and glycine. It is dissolved by the muralytic enzymes, including lysozyme, which does not attack the whole cell wall. Lysis of the cell wall by phage-associated lysin results in the release of soluble fragments composed of the elements of mucopeptide.

Group C carbohydrate extracted with formamide is composed primarily of N-acetylgalactosamine and rhamnose. Serological studies suggest that the specificity of Group C carbohydrate is determined by the N-acetylgalactosamine.

 Submitted on September 27, 1961


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