Abstract
Summary
1. C14-activity of muscle collagen was measured in x-irradiated and sham-irradiated rats given glycine-2-C14 and glucose-U-C14 prior to exposure. 2. Whole body x-irradiation resulted in reduction of isotope concentration of collagen in animals given glycine-2-C14 but caused an increase in isotope concentration when glucose-U-C14 had been administered. 3. It is concluded that x-irradiation and aging have similar over-all effects on collagen metabolism when studied with above-mentioned C14-labeled precursors.
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