PORA is an alias for the gene, P450 (cytochrome) oxidoreductase, in humans. Other names include: NADPH--cytochrome P450 reductase; P450R; CPR; NADPH-cytochrome P450 reductase; CYPOR. The encoded protein is an enzyme with an amino acid length of 677 and a mass of 76.7 kDa. Other isoforms may exist. PORA is a member of the Flavoprotein pyridine nucleotide cytochrome reductase family. This gene shares homology with other species, including: Mouse, Rat.