Abstract: A new glycoprotein ZP-0 originating from the oviduct of a mammal having a molecular weight of about 200,000 to 240,000, as determined by SDS-polyacrylamide gel density-gradient electrophoresis having an isoelectric point of about 4 to 6.2, as determined by isoelectric focusing, containing no sub-fragments, as determined by SDS-disk electrophoresis, forming a carbamylation train in two-dimensional electrophoresis (isoelectric focusing, and SDS-polyacrylamide gel density-gradient electrophoresis, and facilitating species-specific bonding of sperm to zonae pellucidae; and a process for production of the above-mentioned glycoprotein comprising, preparing oviduct from a mammal, homogenating the oviduct optionally with a buffer, to obtain a homogenate, obtaining a liquid containing the glycoprotein from the homogenate, adsorbing the glycoprotein onto lectin immobilized on an insoluble support, liberating the glycoprotein from the support, and recovering the glycoprotein.

Abstract: A new glycoprotein ZP-0 originating from the oviduct of a mammal having a molecular weight of about 200,000 to 240,000, as determined by SDS-polyacrylamide gel density-gradient electrophoresis having an isoelectric point of about 4 to 6.2, as determined by isoelectric focusing, containing no sub-fragments, as determined by SDS-disk electrophoresis, forming a carbamylation train in two-dimensional electrophoresis (isoelectric focusing, and SDS-polyacrylamide gel density-gradient electrophoresis), and facilitating species-specific bonding of sperm to zonae pellucidae; and a process for production of the above-mentioned glycoprotein comprising, preparing oviduct from a mammal, homogenating the oviduct optionally with a buffer, to obtain a homogenate, obtaining a liquid containing the glycoprotein from the homogenate, adsorbing the glycoprotein onto lectin immobilized on an insoluble support, liberating the gylcoprotein from the support, and recovering the glycoprotein.