. The chemical activities of bacteria. Bacteria. 40 BACTERIAL ENZYMES mostly with animal tissues or yeast-cells, so it will be best to summarise the findings for enzymes from these cells and then outline their application to bacteria. The general findings are summarised in Table III. In animal tissues and yeasts the transfer of hydrogen from substrate to oxygen passes through several intermediate oxido-reduction reactions with oxygen as the final hydrogen acceptor in the chain. AHj + B BH,+ C ^enzyme 3 CH2+ D—-—^C + DH2 enzyme 4 DH^+E >- D + EH2 The ultimate carrier (D) is a haematin-protei
. The chemical activities of bacteria. Bacteria. 40 BACTERIAL ENZYMES mostly with animal tissues or yeast-cells, so it will be best to summarise the findings for enzymes from these cells and then outline their application to bacteria. The general findings are summarised in Table III. In animal tissues and yeasts the transfer of hydrogen from substrate to oxygen passes through several intermediate oxido-reduction reactions with oxygen as the final hydrogen acceptor in the chain. AHj + B BH,+ C ^enzyme 3 CH2+ D—-—^C + DH2 enzyme 4 DH^+E >- D + EH2 The ultimate carrier (D) is a haematin-protein called cyto- chrome which is capable of alternate oxidation and reduction. Eeduced cytochrome becomes oxidised again by the action of the enzyme cytochrome oxidase. Oxidised cytochrome can be reduced directly by the action of certain dehydrogenases transferring hydrogen from their substrates to cytochrome. The chain in this case (substrate type 83, Table III) can be represented: /' AH2 ' + Cytochrome > A + Reduced cytochrome dehydrogenase A Cytochrome ^^^^"^ Reduced cytochrome + 0 > Cytochrome + H^O Oxidase The cytochrome is thus alternatively reduced by the action of the dehydrogenase and oxidised by the action of cytochrome. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gale, E. F. (Ernest Frederick). New York, Academic Press
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectbacteria
