Abstract
Th protein content of six potato cultivars, Russet Burbank and the numerically designated 58, 709, 711–3, 321–65 and 322–6, ranged from 5.5 to 8.7 g per 100 g. Similar results were obtained by both Kjeldahl and Biuret procedures. Amino acid analyses with a Beckman model 120C showed methionine to be the low level amino acid. Glutamic and aspartic acids were in higher amounts than the essential amino acids. The Chemical Score was similar to data of bio-assays by the meadow vole,Microtus pennsylvanicus. Cultivar 58 produced the greatest weight gain, but was only significantly higher than cultivars 709 and 711–3. Both weight gains and digestibility were increased by the inclusion of methionine in the diet.
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