on the basis of the sensitivity/resistance to rough-specific bacteriophage t3 of e. coli k-12 derivatives containing mutant pss9 plasmids , of the banding patterns and immunoreactivity of lps isolated from such derivatives and electrophoresed on sds-polyacrylamide gels , and of the sugar composition of the polysaccharide portion of the lps determined by chemical analysis , six determinants for o antigen production were identified and localized .
C0023810
lps
C0069180
o