cytoplasmic membranes ( cm ) prepared from both chemotrophic and phototrophic cells of rhodopseudomonas sphaeroides possess penicillin-binding proteins ( pbps ) , as demonstrated by binding of [ 125 ] furazlocillin to isolated membranes , the subsequent separation of the constituent pbps by sodium dodecyl sulfate-polyacrylamide gel electrophoresis , and their detection by autoradiography .
C0007603
cytoplasmic membranes
C0007634
cells