On 2014 Apr 21, Morgan Price commented:

The annotation of DpigGOR10741-DpigGOR10744, which are important for hydrogen utilization and for growth in vivo by Desulfovibrio piger, as "hmc" is a bit misleading. This gene cluster is very similar to nhc (nine-heme cytochrome complex) of D. desulfuricans 27774 (Saraiva LM, 2001). While Hmc has subunits hmcABCDEF including a 16-heme periplasmic subunit (hmcA), nhc lacks the hmcE and hmcF genes, and the hmcA-like subunit is shorter and has nine hemes. Similarly, D. piger lacks hmcEF and has a shorter periplasmic subunit that is very similar to the nine-heme cytochrome (tree browser view).

On 2014 Apr 21, Morgan Price commented:

The annotation of DpigGOR10741-DpigGOR10744, which are important for hydrogen utilization and for growth in vivo by Desulfovibrio piger, as "hmc" is a bit misleading. This gene cluster is very similar to nhc (nine-heme cytochrome complex) of D. desulfuricans 27774 (Saraiva LM, 2001). While Hmc has subunits hmcABCDEF including a 16-heme periplasmic subunit (hmcA), nhc lacks the hmcE and hmcF genes, and the hmcA-like subunit is shorter and has nine hemes. Similarly, D. piger lacks hmcEF and has a shorter periplasmic subunit that is very similar to the nine-heme cytochrome (tree browser view).