Gen za sintezu citohroma C (CYCS),kod čovjeka nalazi se na kratkom (p) kraku hromosoma 7, pozicija 7p21Raspon ekspresije gena CYCSStrukturna formula hemac
^Tafani M, Karpinich NO, Hurster KA, Pastorino JG, Schneider T, Russo MA, Farber JL. "Cytochrome c release upon Fas receptor activation depends on translocation of full-length bid and the induction of the mitochondrial permeability transition". The Journal of Biological Chemistry. 277 (12): 10073–82. doi:10.1074/jbc.M111350200. PMID11790791.CS1 održavanje: upotreba parametra authors (link)