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Biology of Reproduction, Vol 12, 516-521, Copyright © 1975 by Society for the Study of Reproduction
1 Department of Animal Science, University of California, Davis 95616 The antigonadotropic factor (antibodies) was separated from the progonadotropic factors (probodies) in ovine and equine HCG antisera and in a gamma globulin fraction of equine HCG antiserum by
passing the sera, or a serum salt fractionation product through a column in which HCG had been
covalently coupled to activated Sepharose. The probodies passed through the column whereas the HCG
antibodies were bound to the HCG on the column.
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