Involved in myoblast fusion involved in skeletal muscle regeneration; plasma membrane fusion; and skeletal muscle organ development. Located in Golgi membrane; endoplasmic reticulum membrane; and plasma membrane. Is integral component of plasma membrane. Is expressed in diaphragm; foregut; limb; skeletal musculature; and tail paraxial mesenchyme. Orthologous to human MYMX (myomixer, myoblast fusion factor). [provided by Alliance of Genome Resources, Apr 2022]