EFFECT OF PROMETRYNE AND INDOLE-3-ACETIC-ACID ON THE CHEMICAL-COMPOSITION OF YEAST PROTEIN

The effect of different concentrations of prometryne and indole-3-acet ic acid (IAA) on the protein content of Candida utilis 103, grown on t he acid hydrolysate of sorghum stalks was investigated. Low concentrat ions of prometryne (5 x 10(-11) M) and IAA (2 x 10(-9) M) stimulated p rotein synthesis, while depression was observed at higher concentratio ns. Candida utilis 103, grown on the acid hydrolysate of sorghum stalk s either untreated or treated with low concentrations of prometryne or IAA produced a protein containing highly soluble proteins. Electropho resis of Candida utilis protein detected 14 peaks varying in their rel ative proportions. The treated Candida utilis protein contained the es sential amino acids (lysine, leucine, isoleucine, phenylalanine, valin e and threonine) in more than sufficient quantity as recommended by FA G. Treatment with IAA showed an increase in the amounts of methionine, valine and lysine (55.5, 29.4 and 17.2%, respectively) over that of t he control.