BIOLOGICAL EVALUATION OF A MODIFIED SOYBE AN PROTEIN ISOLATE

The behavior of a modified soybean protein isolate was observed in viv o with fourteen days old swine trough ingestion of milk analog prepare d with this isolate as main source of protein. This protein isolate ha s the same solubility pattern of bovine casein. Coagulation of the mil k substitute has similar characteristics of swine milk rendering a sof t, well emulsified coagulum in the intestine. A commercial soybean pro tein isolate (Proteimax 90 HG, SANBRA-Brazil) tested did not perform s imilarly. These observation led to the conclusion that the modificatio ns on the soybean protein resulted in an appropriated product for pigl et feeding. Biological evaluations indicated Net Protein Ratio and Net Protein Utilization were 72% and 66% relatively to casein, respective ly.