This family consists of bacterial PufQ proteins. PufQ id required for bacteriochlorophyll biosynthesis serving a regulatory function in the formation of photosynthetic complexes [1].

1: A new cytochrome subunit bound to the photosynthetic reaction center in the purple bacterium, Rhodovulum sulfidophilum. Masuda S, Yoshida M, Nagashima KV, Shimada K, Matsuura K; J Biol Chem 1999;274:10795-10801. PMID:10196154