Zonadhesin is a recently discovered sperm membrane protein that binds
to the extracellular matrix of the egg in a species-specific manner. T
he gene for zonadhesin maps to chromosome 5 in the mouse (Zan) and to
chromosome 7 in the human (ZAN) in a position near the gene for the eg
g extracellular matrix protein ZP3. (C) 1997 Academic Press.