ps decarboxylase also co-enriched with the cytoplasmic membranes in fractions derived from chemoheterotrophically and photoheterotrophically grown cells , but substantially greater quantities of ps decarboxylase activity was found in the chromatophores derived from photoheterotrophically grown cells than could be accounted for by cytoplasmic membrane contamination of this sample .
C0007634
cells
C0007603
cytoplasmic membrane