the pattern of localization of ferritin-conjugated antibodies on homologous streptococci before and after trypsin exposure and upon reincubation of the trypsinized cells in fresh medium suggests the following hypothesis : m antigen is secreted by the cell , is partially excreted through the otherwise intact cell wall , and is bound by the wall so that m protein occupies a peripheral , exposed position on the surfaces of the streptococcal cell wall .
C0007634
cells
C0699040
surfaces of