Occurrence of the bidirectional NAD(P)-linked hydrogenase (HoxH) and the membrane-bound uptake hydrogenase (HupL) in cyanobacteria.

athe genomes have been searched by using the respective protein sequences.
bCyanothece sp. PCC 7425 is the only cyanobacterium with the gene of a bifunctional (NADP) hydrogenase (YP_002483374).
The 69 strains have been separated according to the habitat they have been isolated from. Leptolyngbya valderiana BDU 20041 has been omitted from the analysis although it is provided in the genebank (http://www.ncbi.nlm.nih.gov/sutils/genom_table.cgi) since only 89 kbp of its genome has been sequenced. The presence of NifD is given as a marker for the nitrogenase. Completely sequenced strains are given in bold.