Abstract
The amino acid composition of six new protein products from soybean was investigated.
These products include “7S-rich protein”, “11 S-rich protein”, “sponge protein”, “soya milk protein-1 and -2”, and “Okara protein”. The amino acid pattern similarity between each product and soybean, calculated by the method of Tamura et al., was 0.986, 0.994, 0.993, 0.995, 0.997 and 0.983, respectively, where the close similarity was obtained in those prepared from main fraction of soybean protein. But, the high content of lysine for “7S-rich protein” and the low contents of lysine and methionine for “sponge protein” were shown clearly.
The egg scores of the products were calculated to be 40, 46, 49, 49, 52 and 67, respectively, showing the limiting amino acid as sulfur-containing amino acids in any case.
