@article{mbs:/content/journal/micro/10.1099/00221287-3-1-1, author = "Maxted, W. R.", title = "Occurrence of the M Substance of Type 28 Group A in Streptococci of Lancefield Groups B, G and G", journal= "Microbiology", year = "1949", volume = "3", number = "1", pages = "1-6", doi = "https://doi.org/10.1099/00221287-3-1-1", url = "https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-3-1-1", publisher = "Microbiology Society", issn = "1465-2080", type = "Journal Article", abstract = "SUMMARY: Strains of streptococci belonging to Lancefield groups B, C and G were found to possess an antigen which is identical with the group A type 28 M antigen in its ability to absorb group A type 28 antibodies, and to stimulate the production of type 28 antibodies. The antigen also resembles the group A type 28 antigen in its sensitivity to pepsin and trypsin, being inactivated by pepsin but not by trypsin. The antigen does not appear to be the major type-specific antigen in some of the strains not belonging to group A.", }