The objective of this study is to investigate whether dietary supplement of methionine affects plasma homocysteine concentration in cats, a strict carnivore. Twenty-four American shorthair adult cats (> 1 year old) were fed a dry cat food with complete and balanced nutrition and containing 0.98% ...
(HDH). AK converts aspartate into aspartate semialdehyde, and is highly feedback-inhibited by lysine and threonine. HDH converts aspartate semialdehyde into homoserine, which is an intermediate for the biosynthesis of threonine, methionine, and isoleucine. L-Lysine–producing strains therefore often ...
The kinetics of oxidation of l-methionine by chromic acid in acidic medium (pH=0.83–2.2) has been studied spectrophotometrically. The effect of l-methionine and chromium(VI) concentrations on the rate of the reaction was determined. The reaction rate decreases with increasing the pH of the med...
L-Carnitine is an endogenous molecule involved in fatty acid metabolism, biosynthesized within the human body using amino acids: L-lysine and L-methionine, as substrates. L-Carnitine can also be found in many foods, but red meats, such as beef and lamb, are the best choices for adding car...
Values for infants were compared with values previously ob- tained for normal adult subjects (4). In the latter study, nine adult subjects (five male, four female) were studied in a Latin square design (three subjects/cell) using three different servings of the same beef consommR The ...
Abnormalities of one-carbon metabolism in psychiatric disorders: study of methionine adenosyltransferase kinetics and lipid composition of erythrocyte membranes Biol Psychiatry 1986; 21: 1391–1398 CAS PubMed Google Scholar Tempesta E, Casella L, Pirrongelli C, Janiri L, Calvani M, Ancona L . L...
Propionyl-CoA, which is further metabolized to succinate, is also formed during the degradation of amino acids such as methionine, valine, and isoleucine. Propionyl-CoA is carboxylated by biotin-containing propionyl-CoA carboxylase to d-methylmalonyl-CoA. Sign in to download full-...
In the CS the choline molecules are stabilized by cation-π interactions with three structurally conserved aromatic residues (two tryptophan residues from a β-hairpin and one tyrosine residue from the next β- hairpin) and by hydrophobic and electrostatic interactions with one methionine ...
for all amino-acids was BOC, with side-chain protection as follows: arginine, tosyl; systeine, 4-methylbenzyl; serine and threonine, benxyl; aspartic and glutamic acids, benzyl ester; histidine, 2,4-dinitrophenol; lysine, 4-chlorobenzyloxycarbonyl; methionine, sulfoxide; tyrosine, 2-bromo...
(e.g., alanine, valine, leucine, isoleucine, proline, phenylalanine, methionine, tryptophan), beta-branched side chains (e.g., threonine, valine, isoleucine) and aromatic side chains (e.g., tyrosine, phenylalanine, tryptophan, histidine). Thus, a nonessential amino acid residue in an ...