Abstract
Summary
Insoluble collagen was prepared from the uteri of rat, guinea pig, rabbit, pig, cow, and human being, after extracting the salt- and acetic acid-soluble collagens. The insoluble collagen of uterus contained a significantly higher content of hydroxyproline and hydroxylysine than the soluble collagen from uterus. The highest content of hydroxyproline, 115 residue/1000 residues, was found in the insoluble collagen of rabbit uterus. The highest content of hydroxylysine, 16 residues/1000 residues, was found in rat uterine insoluble collagen.
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