4.3.1.19 L-serine - 4.3.1.19 L-Thr inducible enzyme 4.3.1.19 L-Thr constitutive enzyme 4.3.1.19 L-Thr first reaction of the Ile pathway 4.3.1.19 L-Thr key enzyme in biosynthesis of Ile 4.3.1.19 L-Thr the enzyme is an important element in the flux control of Ile biosynthesis 4.3.1.19 L-Thr isoleucine-insensitive enzyme is subject to glucose-mediated catabolite repression 4.3.1.19 L-Thr increase of activity under gluconeogenic conditions in adult-rat hepatocytes cultured on collagen gel/nylon mesh 4.3.1.19 L-Thr the enzyme is formed under anaerobic conditions, the enzyme is induced by L-Ser and L-Thr, cAMP is required for the synthesis of the enzyme 4.3.1.19 L-threonine - 4.3.1.19 L-threonine a step in the pathway for the biosynthesis of isoleucine via isoleucine precursor 2-oxobutanoate generated from threonine, this pathway accounts for a minor fraction of isoleucine biosynthesis, while the majority of isoleucine is instead derived from acetyl-coenzyme A and pyruvate, possibly via the citramalate pathway, overview 4.3.1.19 L-threonine biodegradation of L-threonine, the enzyme is involved in the biosynthetis pathway for isoleucine production, which is competitng with the valine biosynthetic pathway for the second precursor pyruvate 4.3.1.19 L-threonine threonine deaminase is a key regulatory enzyme in the pathway for the biosynthesis of isoleucine, allosteric enzyme regulation model, overview 4.3.1.19 L-threonine the enzyme catalyzes the first step in the biosynthesis pathway of isoleucine for conversion of threonine to 2-oxobutanoate 4.3.1.19 L-threonine the enzyme is involved in the biosynthesis of L-isoleucine