CYP27C1 (cytochrome P450, family 27, subfamily C, polypeptide 1) is a protein that in humans is encoded by the CYP27C1 gene.
This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids.
CYP27C1 is the topic of the comic Sherman's lagoon for May 26, 2016. In response to Hawthorne's inquiry about the chemical, Ernest explains that it is an enzyme that enhances ability to see infrared light, allowing fish to see better in murky waters. Ernest can see however that Hawthorne is more interested in how to synthesize it commercially.
Nelson DR, Zeldin DC, Hoffman SM, et al. (2004). "Comparison of cytochrome P450 (CYP) genes from the mouse and human genomes, including nomenclature recommendations for genes, pseudogenes and alternative-splice variants.". Pharmacogenetics. 14 (1): 1–18. doi:10.1097/00008571-200401000-00001. PMID15128046.