Abstract
The hydrogenase gene from Enterobacter cloacae (IIT-BT 08) was amplified and inserted into a prokaryotic expression vector to create a recombinant plasmid (pGEX-4T-2-Cat/hydA). The recombinant plasmid was transformed into a hydrogen-producing strain of Enterobacter aerogenes (ATCC13408). SDS–PAGE and western blot analysis confirmed the successful expression of the GST-tagged hydA protein. Anaerobic fermentation for the production of hydrogen from glucose was investigated using E. aerogenes ATCC13408 and the recombinant strain. The results showed that the hydrogen yield markedly increased, from 442.82 ± 22.61 ml/g glucose in the ATCC13408 strain to 864.02 ± 36.8 ml/g glucose in the recombinant. The maximum rate of hydrogen production was found to be 53.49 ± 3.34 ml l−1 h−1 using 1% (w/v) glucose as the substrate at pH 6.0 and a reaction temperature of 37°C.
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