2UUR129712839ENSG00000112280ENSMUSG00000026147P20849Q05722NM_001851NM_078485NM_001377289NM_001377290NM_001377291NM_001290691NM_007740NP_001842NP_511040NP_001364218NP_001364219NP_001364220NP_001277620NP_031766Collagen alpha-1(IX) chain is a protein that in humans is encoded by the COL9A1 gene.

[5][6] This gene encodes one of the three alpha chains of type IX collagen, a collagen component of hyaline cartilage.

Studies in knockout mice have shown that synthesis of the alpha 1 chain is essential for assembly of type IX collagen molecules, a heterotrimeric molecule, and that lack of type IX collagen is associated with early onset osteoarthritis.

Mutations in this gene may be associated with multiple epiphyseal dysplasia.

This article on a gene on human chromosome 6 is a stub.