Arginine-glycine-aspartic acid-serine-lysine

The amino acid analysis of gelatin is variable, particularly for the minor constituents, depending on raw material and process used, but proximate values by weight are glycine 21%, proline 12%, hydroxyproline 12%, glutamic acid 10%, alanine 9%, arginine 8%, aspartic acid 6%, lysine 4%, serine 4%, leucine 3%, valine 2%, phenylalanine 2%, threonine 2%, isoleucine 1%, hydroxylysine 1%, and methionine and histidine <1% with tyrosine <0.5%. 

L-Amino acids, 2.5 X 10+6 molar solution of alanine, arginine, asparagine, aspartic acid, cysteine, cystine, glutamine, glutamic acid, glycine, histidine, hydroxyproline, leucine, lysine, methionine, phenylalanine, proline, serine, threonine, tryptophan, tyrosine, valine. 

Fig. I. Early representation of lihoraitlease structure Legend Alanine I At.A). adenine (AN), arginine (ARG). aspartic acid (ASP), cysteine (CYS). cytosine tCN). glutamic acid (GLU), glycine (GLY). guanine IGN), liistidine (HIS), isolcucine (II.HU), leucine iLEL). lysine (LYS). methionine (MET), phenylalanine (PHH). prolinc (PRO), serine (SER), threonine (THR). thymine TN), trypiophan tTRY). ivrosine (TYR). uracil lUN). and valine (VAL)...

By acid hydrolysis with HCl, ten amino acids were obtained from the peat humic acids cystine, lysine, hystidine, arginine, aspartic acid, serine, glycine, glutamic acid, threonine and alanine. Proposals for the structure of humic acids have also been published of these, the structure of the humic acid according to Ludmila (1936) [51] is presented ... 

X 10 cm/min results. On the basis of this value, a mean transfer rate of 800 mg per 24 hours may be calculated for these amino acids we measured (glycine, aspartic acid, threonine, serine, glutamic acid, proline, valine, cystine, methionine, isoleucine, leucine, tyrosine, phenylalanine, ornithine, lysine, histidine and arginine). If and to what extent amino acids are absorbed by the... 

The interaction with both synthetic and naturally occurring amino acids has been studied extensively glycine (138, 173, 219-221), a-(173, 219) and /3-alanine (138, 220), sarcosine (219), serine (222), aspartic acid (138, 173, 222-226), asparagine (222), threonine (222), proline (219), hydroxyproline (219), glutamic acid (138, 222-225), glutamine (222), valine (219, 227), norvaline (219), methionine (222, 226), histidine (228, 229), isoleucine (219), leucine (219, 230), norleu-cine (219), lysine (222), arginine (222), histidine methyl ester (228), phenylalanine (138, 222), tyrosine (222), 2-amino-3-(3,4-dihydroxy-phenyl jpropanoic acid (DOPA) (222), tryptophan (222), aminoiso-butyric acid (219), 2-aminobutyric acid (219,231), citrulline (222), and ornithine (222). 

Small side chains (SSC) =glycine+alanine+serine, Polar chains (PC) =aspartic acid+threonine+serine+glutamic acid+tyrosine+lysine +histidine+arginine. 

Figure 2.9. Amino acid sequences of human defensins. The conserved positions of six cysteine residues are shown in hatched boxes. Abbreviations A, alanine C, cysteine D, aspartic acid E, glutamic acid F, phenylalanine G, glycine H, histidine I, isoleucine K, lysine L, leucine M, methionine N, asparagine P, proline Q, glutamic acid R, arginine S, serine T, threonine V, valine W, tryptophan Y, tyrosine.

Analysis shows the presence of amino acids from 0.2% tyrosine to 30.5% glycine. The live most common amino acids are glycine, 26.4-30.5% proline. 14.8— 189b hydroxy proline. 13.3-14.5% glutamic acid, 11.1 - 11,7% and alanine. 8.6- 11.3%. The remaining amino acids in decreasing order are arginine, aspartic acid, lysine, serine, leucine, valine, phenylalanine, threonine, isolcucine, hydroxylysine, histidine, methionine, and tyrosine. 

Methionine Isoleucine Leucine Tyrosine Phenylalanine Glutamic acid Proline Glycine Alanine Cysteine Valine Lysine Histidine Arginine Aspartic acid0 Threonine Serine Amino acid... 

Figure 6.8 Experimental variation of the retention of 23 phenylthiohydantoin (PTH) derivatives of amino acids with mobile phase composition in RPLC. Mobile phase mixtures of acetonitrile and 0.05M aqueous sodium nitrate buffer (pH — 5.81). All mobile phases contain 3% THF. Stationary phase ODS silica. Solutes D = aspartic acid C-OH = cysteic acid E = glutamic acid N = asparagine S = serine T = threonine G = glycine H = histidine Q = glutamine R = arginine A = alanine METS = methionine sulphone ABA = a-aminobutyric acid Y = tyrosine P = proline V = valine M = methionine NV = norvaline I = isoleucine F = phenylalanine L = leucine W = tryptophan K = lysine. Figure taken from ref. [610]. Reprinted with permission.

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