Comparison Between Nutritional Value of Rice and Wheat Proteins

The nutritional value of the rice protein was compared with that of the wheat protein at three different protein levels by the rat feeding experiment. The diets were prepared from the protein concentrated rice (26.9-33.6% in protein) treated with α-amylase, the wheat gluten (69.4% in protein), wheat starch, rice powder, and wheat flour etc. The results obtained were as follows: 1) Protein efficiency ratio (PER) of the rice protein at 11% protein level was 1.67 (mean), while that of the wheat protein was 0.79 (mean). The ratio was the rice protein 100: the wheat protein 47 (100: 79 in literature). 2) Biological value (BV) of the rice protein at 11% protein level was 63.1, while that of the wheat protein was 49.1; in the ratio of each value was 100: 68 (100: 89 in literature). 3) Linear correlations betwen the nitrogen intake and the body weight gain in the both rice and wheat groups were observed. The slope of the regression line in the rice diet and the wheat diet was 10.24g/Ng intake and 6.74g/Ng respectively; in the ratio was 100: 66. These results indicate that difference between the nutritional value of the rice and wheat proteins are greater than those have been mentioned previously.