Involved in positive regulation of activation of membrane attack complex and positive regulation of angiogenesis. Acts upstream of or within in utero embryonic development. Predicted to be located in extracellular space. Predicted to be part of membrane attack complex. Is expressed in embryo. Human ortholog(s) of this gene implicated in complement component 6 deficiency. Orthologous to human C6 (complement C6). [provided by Alliance of Genome Resources, Apr 2022]