[Relative content of the alpha-, beta- and gamma-chains of the soluble collagen fractions from the bone tissue of rats with a varying supply of vitamin D].

Insufficiency of vitamin D caused a decrease in content of salt- and acid soluble collagen fractions with simultaneous increase of insoluble its fraction in epiphyses of rat tubular bones. At the same time relative content of monomeric alpha-chains was decreased but content of dimeric (beta-chains) and trimeric (gamma-chains) subunits was increased in both collagen fractions. These data are in good agreement with assumption on the increased growth of bone collagen under insufficiency of vitamin D.