Identification of "big" human placental lactogen in placenta and serum.


Because of increasing evidence for the heterogeneity of polypeptide hormones, studies of the molecular species of human placental lactogen (hPL) were initiated. When extracts of freshly delivered human placentas were passed over Sephadex G-100 in 0.05M ammonium carbonate, three immunoreactive peaks were detected. In addition to a peak corresponding to… (More)


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