摘要：

Milk samples at day 16 of lactation were from six mothers delivering infants at 28-30 weeks of gestation and six mothers delivering normal full term infants. These early morning samples were used in a prolactin binding assay to determine whether 125I-labelled human prolactin was selectively bound to a soluble protein fraction. After Sephadex G-100 column chromatography, 7 samples contained a...

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