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Studies on prolactin 48: isolation and properties of the hormone from horse pituitary glands.

作者信息

Li C H, Chung D

出版信息

Arch Biochem Biophys. 1983 Jan;220(1):208-13. doi: 10.1016/0003-9861(83)90402-2.

DOI:10.1016/0003-9861(83)90402-2
PMID:6830233
Abstract

Isolation of prolactin from equine pituitary glands has been described. It has a potency of 42 IU/mg in the pigeon crop-sac test and consists of 199 amino acids. The hormone has only four half-cystine residues in contrast to other mammalian prolactins which have six residues. From NH2-terminal sequence analysis and amino acid composition of cyanogen bromide fragments, the NH2-terminal disulfide loop is missing in the equine prolactin molecule. Circular dichroism spectra indicate that the alpha-helical content of equine prolactin appears to be lower (50%) than that found in the ovine hormone (65%).

摘要

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