Abstract
Among the crops, buckwheat contains much protein and more lysine than polished rice, and the protein score of buckwheat is estimated to be high.
The rate of growth and the activity of liver xanthine oxidase were examined in rats fed on buckwheat flour as protein source. The same examinations were made on rats fed onpolished rice flour.
(1) The rate of growth and the activity of xanthine oxidase of the group given buckwheat flour were higher than those of the polished rice flour.
(2) The increase of weight and the activity of xanthine oxidase were higher in the group given buckwheat flour supplemented with 0.2% L-lysine, 0.6% DL-threonine and 0.4%DL-methionine than the group without supplement.
(3) The group given polished rice supplemented with amino acids (lysine, methionine, threonine and tryptophan) was compared with the group given 2/3 of polished rice flour a 1/3 of buckwheat flour. Each diet contained 6% of casein and 11% of the t otal amount of protein. No significant difference was found between the two groups. This result was assumed to be due to the supplemental effect of amino acids given by buckwheat flour on polished rice flour.
