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...

Viral determinants and mechanisms involved in extension of host range of monocot-infecting viruses are poorly understood. Viral coat proteins (CP) serve many functions in almost every aspect of the virus life cycle. The role of the C-terminal region of Wheat streak mosaic virus (WSMV) CP in virus biology was examined by mutating six negatively charged aspartic acid residues at positions 216, 28...

Considerable evidence is accumulating concerning the role of growth factors in the metabolism of amino acids by microorganisms. Koser, Wright, and Dorfman (1942) demonstrated a relationship between aspartic acid and biotin in that aspartic acid can serve as a partial substitute for biotin in the growth of Torula cremoris. Pantothenic acid influences the synthesis of tryptophane by Staphylococcu...

Decapod crustaceans synthesize highly active proteolytic enzymes in the midgut gland and release at least a part of them into the stomach where they facilitate the first step in peptide hydrolysis. The most common proteinases in the gastric fluid characterized so far are serine proteinases, that is, trypsin and chymotrypsin. These enzymes show highest activities at neutral or slightly alkaline ...

One or more of the five acidic amino-terminal residues of skeletal muscle actin have been implicated as being important in a number of actin-related processes. We have constructed a series of actins containing mutations at Asp3 and Asp11 and tested these mutant proteins for their ability to bind to DNase I-agarose, polymerize with rabbit skeletal muscle actin, undergo amino-terminal processing,...

A series of copoly(alpha-amino acids) with varying percentages of hydrophilic (L-aspartic acid) and hydrophobic monomers (L-leucine, beta-methyl-L-aspartate, and beta-benzyl-L-aspartate) were implanted subcutaneously in rats and the macroscopic degradation behavior was studied. Three groups of materials (A,B,C) with different ranges of hydrophilicity were distinguished: A) hydrophobic materials...

• Experimental solubility data of amino acids in KCl and (NH 4 ) 2 SO aqueous solutions. ePC-SAFT modelling solid-liquid equilibria water + acid salt mixtures. Ion effects on the different polarity. The effect L-aspartic acid, L-glutamic L-tryptophan, L-tyrosine, seldomly found literature, was studied at 298.2 K, solutions , for concentrations up to 2.0 mol·kg -1 . In this concentration range, ...