P4HA3 encodes the human gene, Prolyl 4-hydroxylase, alpha polypeptide III. It may also be known as: Prolyl 4-hydroxylase subunit alpha-3; 4-PH alpha-3; Procollagen-proline,2-oxoglutarate-4-dioxygenase subunit alpha-3; collagen prolyl 4-hydroxylase alpha(III). The encoded protein is an enzyme with an amino acid length of 544 and a mass of 61.1 kDa. P4HA3 is a member of the P4HA family. Homologs of this gene exist in other organisms, including: Rat, Zebrafish, Chicken.