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Amino Acid structure, Stokes radius (a) and diffusion coeficients (D)
(a) given in angstroms; (D and E[D]) given in 10-5 cm2/sec;
Expected value of D, E[D], estimated by regression of known values.


L-2-Aminopropionic Acid (Alanine) D = 0.91 a = 2.28
Synonyms: Ala; A; Alanine; 2-Aminopropanoic acid; 2-ammoniopropanoate; L-alanine; 
C3H7NO2
89.0938

Glycine D = 1.064 a = 2.56
Synonyms: Gly; G salt; Aminoacetic Acid; Glycocoll; glycine, free base; Athenon; Iconyl; Monazol; glycosthene; 
C2H5NO2
75.067

L-methionine E[D] = 0.697 a = 4.65
Synonyms: (S)-(-)-Methionine; Met; M; Methionine; L-(-)-methionine; 2-Amino-4-(methylthio)butanoic acid; L-alpha-amino-gamma-methylmercaptobutyric acid; L-(-)-amino-gamma-methylthiobutyric acid; 2-amino-4-(methylthio)-butyric acid; cymethion; L-gamma-methylthio-alpha-aminobutyric acid; meonine; methilanin; neston; lobamine; meritonin; neo-methidin; thiomedon; cynaron; dyprin; metione; banthionine; L-2-Amino-4-(methylthio)butyric acid; 
C5H11NO2S
149.2074

Glycyl-glycine D = 0.79 a = 4.37
Synonyms: N-glycylglycine; Gycylglycine; 
C4H8N2O3
132.1188

(S)-(-)-Phenylalanine E[D] = 0.699 a = 4.622
Synonyms: (S)-Phenylalanine ; Phe; F; Phenylalanine; L-(-)-Phenylalanine; L-Phenylalanine; 2-Amino-3-phenylpropanoic acid; beta-phenylalanine; alpha-aminohydrocinnamic acid; alpha-amino-beta-phenylpropionic acid; 3-phenylalanine; phenyl-L-alanine; (S)-alpha-aminobenzenepropanoic acid; antibiotic fn 1636; PAL; phenyl-alpha-alanine; beta-phenyl-alpha-alanine, L-; L-beta-phenylalanine; L-2-Amino-3-phenylpropionic acid;
C9H11NO2
165.1914

L-Serine [D] = 0.89 a = 3.12
Synonyms: (S)-(-)-Serine; Ser; S; Serine; L-2-Amino-3-hydroxypropionic Acid; L-(-)-serine; 2-amino-3-hydroxypropionic acid; 3-hydroxy-alanine; L-SERINE SIGMA GRADE;
C3H7NO3
105.0932

(S)-(+)-Arginine [D] = 0.646 a = 5.34
Synonyms: 2-Amino-5-guanidinovaleric acid; Arg; Arginine; L-(+)-Arginine; L-Arginine; 2-Amino-5-guanidinopentanoic acid; L-ARGININE FREE BASE SIGMA GRADE CRYSTALLINE;
C6H14N4O2
174.2022

L-Asparagine [D] = 0.781 a = 3.83
Synonyms: (S)-(-)-Asparagine; Asn; N; Asparagine; 2-Amino-3-carbamoylpropanoic acid; 2-Aminosuccinamic acid;
C4H8N2O3
132.1188

L-Aspartic acid [D] = 0.795 a = 3.72
Synonyms: (S)-(+)-Aspartic Acid; Asp; D; Aspartic acid; sparaginic Acid; 2-Aminobutanedioic acid; L-2-Aminobutanedioic acid; L-Aminosuccinic acid; 2-aminosuccinic acid; L-ASPARTIC ACID FREE ACID SIGMA GRADE CRYSTALLINE;
C4H7NO4
133.1036

(S)-(-)-Cysteine E[D] = 0.849 a = 3.35
Synonyms: L-beta-mercaptoalanine; Cys; C; Cysteine; L-Cysteine; 2-Amino-3-mercaptopropanoic acid; CySH; (+)-2-Amino-3-mercaptopropionic acid; L-CYSTEINE FREE BASE CRYSTALLINE;
C3H7NO2S
121.1538

(2S,7S)-(-)-Cystine E[D] = 0.614 a = 5.88
Synonyms: 3,3'-Dithiobis(2-aminopropionic acid); Cys-SCy; Cystine; L-Cystine; L-(-)-cystine; L-(-)-3,3'-Dithiobis(2-aminopropanoic acid); L-Dicysteine; L-alpha-Diamino-beta-dithiolactic acid; Dicysteine; alpha-Diamino-beta-dithiolactic acid; L-CYSTINE SIGMA GRADE CRYSTALLINE;
C6H12N2O4S2
240.2918

L-Glutamic Acid E[D] = 0.762 a = 3.99
Synonyms: (S)-(+)-Glutamic Acid; Glu; E; Glutamic acid; (+)-glutamic acid; (+)-L-glutamic acid; L-Glutaminic acid; Glutaminic acid; 2-Aminoglutaric acid;
C5H9NO4
147.1304

L-Glutamine E[D] = 0.715 a = 4.44
Synonyms: (S)-(+)-Glutamine; Gln; Q; Glutamine; L-(+)-glutamine; L(+)-Glutamic acid-5-amide; 2-aminoglutaramic acid; Levoglutamide;
C5H10N2O3
146.1456

(S)-(-)-Histidine E[D] = 0.714 a = 4.45
Synonyms: Glyoxaline-5-alanine; His; H; Histidine; Alpha-amino-4-imidazolepropionic acid; L-Histidine, Free Base; L-(-)-histidine; 2-Amino-3-(1H-imidazol-4-yl)-propanoic acid; L-2-Amino-3-(4-imidazolyl)propionic acid; Alpha-amino-1H-imidazole-4-propionic acid;
C6H9N3O2
155.156

L-(+)-Isoleucine E[D] = 0.826 a = 3.50
Synonyms: (2S,3S)-(+)-Isoleucine; Ile; I; Isoleucine; L-2-Amino-3-methylvaleric Acid; L-Isoleucine; (2S)-2-Amino-3-methylpentanoic acid; 2-Amino-3-methylvaleric acid; L-ISOLEUCINE SIGMA GRADE;
C6H13NO2
131.1742

L-Leucine E[D] = 0.828 a = 3.49
Synonyms: (S)-(-)-Leucine; Leu; L; Leucine; L-(-)-leucine; 2-Amino-4-methylpentanoic acid; L-Leu; L-2-Amino-4-methylpentanoic acid; 2-amino-4-methylvaleric acid; (2S)-alpha-Leucine; (2S)-alpha-2-amino-4-methylvaleric acid;
C6H13NO2
131.1742

(S)-(+)-Lysine E[D] = 0.760 a = 4.01
Synonyms: Lysine acid; Lys; K; Lysine; 2,6-Diaminohexanoic acid; L-lysine;
C6H14N2O2
146.1888

L-Proline
Synonyms: (S)-(-)-Proline; Pro; P; Proline; L-(-)-proline; 2-Pyrrolidinecarboxylic acid; (S)-proline;
C5H9NO2
115.1316

L-Threonine E[D] = 0.867 a = 3.243
Synonyms: (2S,3R)-(-)-Threonine; Thr; T; Threonine; L-(-)-threonine; (2S,3R)-threonine; L-2-Amino-3-hydroxybutyric acid; 2-Amino-3-hydroxybutyric acid;
C4H9NO3
119.12

DL-Tryptophan E[D] = 0.666 a = 5.04
Synonyms: Tryptophane;
C11H12N2O2
204.228

(S)-(-)-Tyrosine E[D] = 0.671 a = 4.97
Synonyms: p-tyrosine; Tyr; Y; Tyrosine; L-Tyrosine; L-(-)-tyrosine; 2-Amino-3-(4-hydroxyphenyl)-propanoic acid; 3-(4-Hydroxyphenyl)-L-alanine; 3-(p-hydroxyphenyl)alanine; 2-amino-3-(p-hydroxyphenyl)propionic acid; L-TYROSINE FREE BASE;

C9H11NO3
L-Valine E[D] = 0.866 a = 3.25
Synonyms: (S)-(+)-Valine; Val; V; Valine; L-(+)-valine; L-2-Amino-3-methylbutyric acid; 2-Aminoisovaleric acid; 2-Amino-3-methylbutyric acid;
C5H11NO2
117.1474