upon chromatography of crude extracts of pst ( + ) cells on columns of diethylaminoethyl-cellulose , sephadex g200 , and calcium hydroxyapatite , fractions were recovered which inhibited the growth of indicator cells of escherichia coli , y. pseudotuberculosis , y. enterocolitica , and pst ( - ) y. pestis .
C0007634
cells
C0007595
growth of