whereas the mvl2 used in these studies was contaminated with several host cell proteins as determined by sodium dodecyl sulfate-containing polyacrylamide gel electrophoresis , the contaminants probably did not play a role in the induction because isolated cell membranes or soluble cell contents from achoplasma laidlawii are inactive as inducers .
C0007603
cell membranes
C0007634
cell