Summary. 1. Prostaglandin extracted from human seminal fluid and from prostate gland of sheep have been compared chemically and biologically. 2. It has not been possible to distinguish the two substances by paper chromatography, thermostability or biological tests, including rabbit jejunum, rat jejunum, guinea‐pig ileum, guinea‐pig uterus, rabbit blood pressure and cat blood pressure. This investigation has been supported by grants from the Therese and Johan Anderssons Minne, the Lars Hiertas Minne and Karolinska Institutet Stockholm.
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Rune Eliasson (1957) studied this question.
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