“…Paenirhodobacter enshiensis DW2-9 T has recently been described as a non-pigmented cell within the Rhodobacteraceae. Unfortunately, hydrogen production through nitrogenase activity has not been reported for this species so far, but it is unlikely to occur via nitrogenase activity since no homologs of nifH, nifD and nifK (the structural genes for nitrogen fixation) can be found in the complete genome draft sequence (Wang et al, 2015).…”