[Use of Wheat Germ Lectin-Sepharose for isolating pregnancy-specific protein]

Specific pregnancy protein was obtained from retroplacental blood serum by saline fractionation, affinity chromatography on Wheat germ Lectin-Sepharose, gel filtration on Sephadex G-200, hydrophobic chromatography on Phenyl-Sepharose, and ion exchange chromatography on DEAE-Sephacel. The purified preparation of specific pregnancy protein is highly suitable for preparing antisera and the development of immuno- and radioassays of the protein in question.