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. 1981 Nov;14(5):530–533. doi: 10.1128/jcm.14.5.530-533.1981

Extraction of group A streptococcal M protein with nitrous acid.

K Hafez, A M El Kholy, R R Facklam
PMCID: PMC273982  PMID: 7309850

Abstract

Specific precipitating and opsonic neutralizing antigens were identified in dilute-nitrous acid extracts of group A streptococci. This was done by decreasing the temperature and time of exposure of the streptococcal cells to the nitrous acid. Ninety percent of 31 strains of group A streptococcal dilute-nitrous acid extracts formed precipitin lines of identity with conventional Lancefield extracts of the same group A streptococci.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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