Amino acids and peptides. XV. A new synthesis of .ALPHA.-amino acids by amination of .ALPHA.-metalated carboxylic acids.

Antigenicity of Polypeptides (poly Alpha Amino Acids)

It has been shown that the polymers GLA5, GLT, GLA40, and GLAT are antigenic in human beings. Both immediate skin reactions and delayed (cellular) reactions were observed. The antibody produced reacted well in the precipitin reaction, agglutinated antigen coated tanned sheep cells, was less effective in inducing PCA reactions, and failed to sensitize guinea pigs for passive systemic anaphylaxis...

Alpha helix propensity of amino acids.

Synthesis and Functionalization of Gold Nanoparticles by Using of Poly Functional Amino Acids

Synthesis and characterization of two functionalized gold nanoparticles by using of two poly functional amino acids (L-Arginine and L-Aspartic acid) are reported. The gold nanoparticles were reduced by sodium citrate and functionalized with L-Arginine at the pH of 7 and 11 and L-Aspartic acid at the pH of 7. Transmission electron microscopy, UV-Vis spectroscopy, dynamic light scattering, zeta p...

Nucleophilicities of amino acids and peptides.

The kinetics of the reactions of amino acids with stabilized diarylcarbenium ions (Ar(2)CH(+)) have been studied photometrically in aqueous solution at variable pH. In the range of 10.5 < pH < 12, the amino acids react much faster than the competing nucleophiles hydroxide and water. Though the pK(aH) values of the amino acids vary by almost four units, the nucleophilic reactivities of all prima...

Amino Acids, Amines and Peptides of Ram

Epididymal semen was obtained from rams with a fistula present in the vas deferens (Tadmor & Schindler, 1966). It was deproteinized immediately, and the protein-free clear supernatant evaporated to dryness in vacuo at a temperature not exceeding 55\s=deg\C. The residue was taken up with about 10 ml water, and the solution thus obtained used for determination of both amines and amino acids. For ...