Involved in blood coagulation. Predicted to be located in extracellular space and plasma membrane. Predicted to be part of membrane attack complex. Biomarker of polycystic kidney disease. Human ortholog(s) of this gene implicated in age related macular degeneration 15 and complement component 9 deficiency. Orthologous to human C9 (complement C9). [provided by Alliance of Genome Resources, Apr 2022]