Staphylococcal sphingomyelinase (beta-hemolysin).
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Biomedical subjects
Publications and source records attributed to L S Avigad.
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Various straight-chain thiols produce approximately the same maximal activation of streptolysin O.
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Several preparations of staphylococcal alpha-toxin and delta-lysin were studied in order to compare hemolytic activity with capacity to lyse bacterial protoplasts. delta-Lysin in relatively low concentration lysed protoplasts of Sarcina lutea, protoplasts of Streptococcus faecalis, and spheroplasts of Escherichia coli. Lysis of bacterial protoplasts by preparations of alpha-toxin appeared to be due to contamination of the preparations with delta-lysin. Data comparing the protoplast-lysing activity of various lytic agents are presented.