Table 3 Turnover frequency for hydrogen production in the light in different strains.

From: In-vivo turnover frequency of the cyanobacterial NiFe-hydrogenase during photohydrogen production outperforms in-vitro systems

Strain

Number of H2ases/cell

Photo H2 nmol H2/min/mg Chl

Turnover frequency H2/s

Wild type

430 ± 30

15.63 ± 2.50

18 ± 3

ΔctaIΔcyd

788 ± 42

187.50 ± 20.30

119 ± 13

ΔcydΔctaII

830 ± 42

114.10 ± 17.20

69 ± 10

ΔctaIΔcydΔctaII

670 ± 5

100.34 ± 18.80

75 ± 14

M55

62 ± 8

5.5 ± 0.40

45 ± 3

  1. The cellular nickel content measured in this study allowed us to determine the turnover frequency of the NiFe-hydrogenase in wild type cells and some mutants of respiratory terminal oxidases on the basis of previously published data20.
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