Abstract
ZONE electrophoresis on starch-gel revealed that purified sheep prolactin contained at least four components with crop-sac stimulating activity in the pigeon1. Recently three preparations of purified human growth hormone made by different procedures in different laboratories have been examined by the same method. They all show a striking similarity to sheep prolactin in the mobility and relative amounts of the principal components. This similarity has also been observed by Barrett, Friesen and Astwood2. By contrast the patterns are quite unlike the patterns we have observed with ox, sheep, pig and whale growth hormone.
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References
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FERGUSON, K., WALLACE, A. Prolactin Activity of Human Growth Hormone. Nature 190, 632–633 (1961). https://doi.org/10.1038/190632a0
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DOI: https://doi.org/10.1038/190632a0
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