OVGP1

Oviduct-specific glycoprotein also known as oviductal glycoprotein (OGP) or estrogen-dependent oviduct protein (EGP) or mucin-9 (MUC9) is a is_associated_with::protein that in humans is encoded by the OVGP1 is_associated_with::gene.

Function
Oviduct-specific glycoprotein is a large, carbohydrate-rich, epithelial is_associated_with::glycoprotein with numerous O-glycosylation sites located within is_associated_with::threonine, is_associated_with::serine, and is_associated_with::proline-rich tandem repeats. The gene is similar to members of the is_associated_with::mucin and the glycosyl hydrolase 18 gene families. Regulation of expression may be is_associated_with::estrogen-dependent. Gene expression and protein secretion occur during late follicular development through early cleavage-stage embryonic development. The protein is secreted from non-ciliated is_associated_with::oviductal epithelial cells and associates with ovulated is_associated_with::oocytes, is_associated_with::blastomeres, and spermatozoon acrosomal regions.