Abstract
MULLER'S phenomenon, which may be defined as the appearance of small circular areas or plaques of clearing around the growth of a Staphylococcus pyogenes on a serum-containing chromo-protein agar substrate, has been recently reviewed by Elek1, who suggests that this proteolytic effect is due either to a non-pathogenic virus or to a hitherto unrecognized enzyme precursor present in sera and activated by a staphylococcal factor.
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References
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PORTER, I. Muller's Phenomenon. Nature 194, 995 (1962). https://doi.org/10.1038/194995a0
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DOI: https://doi.org/10.1038/194995a0
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