upon exposure to 6,000 u of polymyxin b sulfate per ml , cells of the polymyxin-sensitive pao 1 strain of pseudomonas aeruginosa displayed in thin sections long projections arising from the outer membrane of the cell wall and extensive cytoplasmic degradation with accumulation of cytoplasmic membrane infoldings .
C0001714
polymyxin b sulfate
C0032539
polymyxin