The Fate of Intradermal Doses of Labelled Amino Acids in Sheep

Abstract

When sheep were given intradermal doses of 0-5 ml of 0-9% NaCl containing 5-1400 p.g L_[36S]cystine, an area of labelled wool with a much higher specific activity than the rest of the fleece and corresponding to about 7 cmll of skin was produced. Over this range of mass of cystine, about 21-1 % of the dose of 35S was incorporated into the wool grown by this area.