Abstract
Classic protein fractions 1, 2, 3 and 4 (albumins, globulins, prolamines and glutelins, resp.) were obtained from sorghum cv. SC 301, NSA 740, CK 60, TX 615 and GA 615 differing in endosperm/pericarp structure and in tannin content. There were differences in amino acid profiles and protein distribution of isolated fractions between cv. Methionine, cysteine, isoleucine and leucine were most limiting in fractions 1 and 2. Fractions 3 and 4 were most deficient in lysine in all 5 cv. The leucine:lysine ratio was >20 in all of the fraction 3 except in GA 615; the ratio in all of the other fractions was <4. Fractions 1 and 2 extracted from GA 615 contained less protein than those from the other cv. The comparable extent of essential amino acid deficiencies and excesses in these fractions is given
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