It is preferred to use 1-2 equivalents of alkali per mol hydantoin and to operate at 130-220 DEG C. Examples describe the preparation of alanine, a -aminoisobutyric acid, tryptophan and methionine.
Some examples are given for the chromatography of model mixtures of L-Val, L-His, L-Tyr, L-Try, Tyr-Try dipeptides and protein hydrolyzing solution of fish. The separation was based on the different stabilities of copper complexes of alpha-amino acids, peptides and IDA-Sephadex G10. The ...
Abstract of EP0288795A new process of synthesis of optically active alpha -amino acids is described through nitrosation in a non-aqueous, aprotic system, of the corresponding N-ca
Learn about the alpha helix. Discover the alpha helix structure and beta sheet hydrogen bonds, and examine alpha helix proteins and amino acids.
such as gel electrophoresis, mass spectrometry based proteomics, stable isotope labeling with amino acids in cell culture, shaving (the use of bead-anchored trypsin to digest cell surface proteins, followed by mass spectrometry analysis and comparison with computer stimulated trypsin digestion of selected...
For those examples with fluorine in the ortho position (i.e., the 2-fluoro and pentafluoro derivatives) a slightly higher field chemical shift was observed for the benzylic carbon atom (c 5051 ppm). In the fast-atom bombardment mass spectra, pseudo-molecular ions, MH+, and ions resulting ...
The sequence of amino acids on proteins that indicates that they are to be retained in the secretory processing system, for example the Golgi apparatus, and not passed on and released. Can be applied to any similar situation in which sorting of macromolecules into different compartments occurs. ...
The invention concerns novel renin-inhibitory peptides which contain novel amino acids having an α-heteroatom attached to the backbone of the amino acid. These novel amino acids are positioned at the
EXAMPLE A To a stirred, ice-cooled solution of one mole of the amine (see Table I for specific examples) dissolved in 142 parts of ethyl ether are added dropwise during a period of 1.5 to 2 hours, 104.5 parts of methacrylyl chloride and a solution of 40 parts of sodium hydroxide diss...
Also suitable as components (a) are the amides of identical or different, unsaturated carboxylic acids with aromatic, cycloaliphatic and aliphatic polyamines having preferably 2 to 6, especially 2 to 4, amino groups. Examples of such polyamines are ethylenediamine, 1,2- or 1,3-propylenediamine, ...