CFAP221 is a symbol for the gene, Cilia and flagella associated protein 221, in humans. Other names include: Cilia- and flagella-associated protein 221; Primary ciliary dyskinesia protein 1; flagellar associated protein 221 homolog (Chlamydomonas); primary ciliary dyskinesia 1 homolog (mouse); FAP221; PCDP1. The encoded protein has an amino acid length of 840 and a mass of 96.9 kDa. Other isoforms may exist. CFAP221 is a member of the PCDP1 family. This gene shares homology with other species, including: Mouse, Rat.