Cereal Chem 47:266 - 272.  |  VIEW ARTICLE
Amino Acid Composition and Nutritional Value of Milled Fractions of Sorghum Grain.

F. K. Shoup, C. W. Deyoe, L. Skoch, M. Shamsuddin, J. Bathurst, G. D. Miller, L. S. Murphy, and D. B. Parrish. Copyright 1970 by the American Association of Cereal Chemists, Inc. 

Two sorghum-grain hybrids of equal protein content were milled, with conventional dry-milling equipment. Protein content of the endosperm fractions ranged from 6.82 to 15.96%. The fat, fiber, and ash contents of all fractions were approximately 1.0, 1.0, and 0.5%, respectively. Amino acid composition of the fractions varied. On the basis of essential amino acid contents, the nutritional quality of low-protein fractions was superior to that of high-protein fractions. Nutritive value of milled products of low- and high-protein content from each hybrid was compared on the basis of growth and protein efficiency ratios (PER's) of rats, with casein control diets used. Each fraction was fed with and without lysine and methionine supplementation. When diets were not supplemented with lysine and methionine the low-protein endosperm fraction was superior to the high-protein endosperm fraction. However, when the low- and high-protein fractions were supplemented with amino acids to meet calculated requirements, differences were not found, indicating that protein was utilized similarly when deficient amino acids were supplied. Amino acid supplementation of diets caused a marked increase in weight gain of rats, and PER's were similar to those obtained with casein. Differences in PER's relating to hybrids were nonsignificant, irrespective of amino acid supplementation.