منابع مشابه
The Cell Walls of Group D Streptococci
Group D Types 1 and 26 cell walls and the corresponding type-specific carbohydrates, extracted from the walls by various means, contain rhamnose, glucose, galactose, N-acetylglucosamine, and N-acetylgalactosamine. Mucopeptide elements are also present in the walls and in enzymatically-extracted carbohydrates. Types 1 and 26 carbohydrates extracted by formamide contain no mucopeptide, but the se...
متن کاملStudies of streptococcal cell walls. V. Amino acid composition of cell walls of virulent and avirlent group A hemolytic streptococci.
Investigations of the cellular components concerned with the antigenicity and virulence of group A streptococci indicate that the typespecific M protein is the antigen most consistently associated with virulence (Lancefield, 1940). The ability of these organisms to resist phagocytosis is, perhaps, the most important factor in conferring virulence. Wiley and Wilson (1956) have made an extensive ...
متن کاملBinding of deoxyribonucleic acid by cell walls of transformable and nontransformable streptococci.
Cell walls isolated from competent streptococci (group H strain Challis) were shown to bind more homologous and heterologous deoxyribonucleic acid (DNA) than noncompetent walls. Heat- and alkali-denatured DNA was not bound by either wall preparation. Pretreatment of cell walls with cetyltrimethylammonium bromide sharply increased the binding of DNA but did not increase transformation of whole c...
متن کاملModulation of the susceptibility of inbred and outbred rats to arthritis induced by cell walls of group A streptococci.
Inbred Buffalo rats were resistant to the induction of experimental arthritis induced by systemic injection of cell wall fragments in a crude whole-cell sonic extract of group A streptococci. This was in contrast to the susceptibility of outbred Sprague-Dawley and certain other inbred strains. Preliminary breeding studies indicated that genetic control of resistance of susceptibility is multige...
متن کاملThe Lysis of Cell Walls of Group a Streptococci by Streptomyces Albus Enzyme Treated with Diisopropyl Fluorophosphate
Diisopropyl fluorophosphate (DFP) effectively inhibited proteolytic activity in preparations of partially purified Streptomyces albus enzyme used to lyse cell walls of Group A streptococci. Lysis of non-trypsinized Group A cell walls with DFP-treated S. albus enzyme released a soluble protein fraction containing antigenic type-specific M protein, a carbohydrate fraction consisting of Group A an...
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ژورنال
عنوان ژورنال: Journal of General Microbiology
سال: 1965
ISSN: 0022-1287
DOI: 10.1099/00221287-41-3-375