Predicted to be an extracellular matrix structural constituent. Involved in aging and response to activity. Predicted to be located in basement membrane. Predicted to be part of collagen type IV trimer. Predicted to be active in extracellular matrix and extracellular space. Human ortholog(s) of this gene implicated in atherosclerosis; brain small vessel disease 2; and porencephaly. Orthologous to human COL4A2 (collagen type IV alpha 2 chain). [provided by Alliance of Genome Resources, Apr 2022]