in current study, protein hydrolysates were produced using microbial proteases of alcalase, protamex and flavourzyme from yellowfin tuna viscera. the results indicated that, protein hydrolysate from alcalase, had significantly higher protein content, nitrogen recovery and degree of hydrolysis than the others (p 0.05). the results of amino acids composition revealed that all hydrolysates were al...

The aim of this account is to summarize current views on the absorption of the products of protein digestion, amino acids and peptides. Longer reviews of protein absorption (Wiseman, 1968; Matthew, 1969, 1971; Gray & Cooper, 1971) will provide references not given here. Hormonal effects on absorption are reviewed by Levin (1969). Protein digestion is initiated in the stomach by pepsins and cont...

The transport of free amino acids into cells is the first step in protein synthesis, and, therefore, an essential part of growth. Hormones that increase protein synthesis and growth over a period of time can do so only if increased supplies of free amino acids are made available inside the cells. This increased supply may occur (a) through an increased formation of amino acids within the cells;...

By using a rapid and sensitive method for determination of total protein and free amino acid contents we have shown that mouse preimplantation embryos developing in vivo and in vitro contain decreasing amounts of protein until the late blastocyst stage. Free amino acid contents in embryos developing in vivo drop following fertilization and then rise gradually until the late blastocyst stage. Em...