The nutritional quality of proteins of four cultivated cucurbit species was measured by nitrogen balance. The biological value of muskmelon, watermelon and pumpkin proteins were 59, 64, and 67 respectively. A value of 70 for bittergourd kernels was calculated from chemical score. Lysine was the first limiting essential amino acid in all the proteins. The leucine:isoleucine and leucine:lysine ratios did not show imbalance.
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Sharma et al. (1986) studied this question.
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