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. 2019 Dec 13;86(1):e01522-19. doi: 10.1128/AEM.01522-19

TABLE 1.

Hydrogenase activities of trophosome samples and cultivated bacteria

Species Specimen conditions before harvest Assay headspace gas Activity (mmol of H2 min−1 mg of protein−1)a nb
H. thermophilus MA2-6 Batch culture with H2 H2 0.39 1c
Batch culture with H2 Ar 0.12 1
Batch culture with H2 H2 1.48 1
Batch culture with H2 Ar 0.00 1
R. pachyptila 1d Freshly collected H2 −0.001 ± 0.002 3
R. pachyptila 2 Freshly collected H2 −0.006 ± 0.007 2
R. pachyptila 3 Freshly collected H2 0.000 ± 0.003 2
R. pachyptila 4 Aquaria with H2 H2 −0.006 ± 0.005 2
R. pachyptila 5 Aquaria with H2 H2 −0.004 ± 0.003 2
R. pachyptila 6 Aquaria with H2 H2 −0.001 ± 0.004 2
a

Values are means ± standard deviations.

b

n, number of times activity was measured for a particular culture or individual.

c

For the H. thermophilus MA2-6 samples, values measured in the presence of H2 gas were statistically different (P < 0.001) from those measured in the presence of Ar.

d

R. pachyptila 1 to 6 are six different individuals.