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Amino Acids

Description & Product No. Characteristics Three- and One-letter Code Formula & MW [g/mol] Solubility g/L H2O (25°C) Isoelectric point (pI) Acid dissoziation constant (25°C)
L-Alanine non-polar amino acid Ala, A C3H7NO2 165 6 pK1= 2,35
A3690 (BioChemica) MW = 89,09 218 (50°C) pK2= 9,87
A1688 (Ph. Eur.; USP)
L-Alanyl-L-glutamine "stable glutamine" for cell culture applications; improved solubility Ala-Gln C8H15N3O4 568 (20°C)
A3198 (Cell culture) MW = 217,23
5-Aminolevulinic acid hydrochloride first compound in the porphyrin synthesis pathway C5H9NO3 • HCl 100
A1731 (BioChemica) MW = 167,61
L-Arginin base basic amino acid; positively charged at neutral pH; polar
Arg, R C6H14N4O2 150 10,76 pK1= 2,18
A3675 (BioChemica) MW = 174,20 pK2= 9,09
A3653 (Cell culture)
A1345 (Ph. Eur.; USP)
L-Arginine hydrochloride Arg, R C6H14N4O2 • HCl 900
A3709 (BioChemica) MW = 210,66
A1700 (Ph. Eur.; USP)
L-Asparagine monohydrate polar amino acid Asn, N C4H8N2O3 • H2O 22-30 pK1= 2,02
A3721 (BioChemica) MW = 150,14 pK2= 8,80
A1668 (Ph. Eur.; USP)
L-Aspartic acid acidic amino acid; negatively charged at neutral pH Asp, D C4H7NO4 4-5 (20°C) 2,77 pK1= 1,88
A1701 (Ph. Eur.; USP) MW = 133,10 pK3= 9,60 (NH2)
L-Cysteine polar amino acid; contains a sufhydryl group Cys, C C3H7NO2S 280 5,05 pK1= 1,91
A3694 (BioChemica) MW = 121,16 pK2= 10,28
A1425 (Ph. Eur.; USP) pK3= 8,14 (SH)
L-Cysteine hydrochloride monohydrate Cys, C C3H7NO2S • HCl • H2O 650
A3698 (BioChemica) MW = 175,64
A1702 (Ph. Eur.; USP)
L-Cystine dimeric amino acid formed by the oxidation of two cysteine residues (forming a disulfide bond) C6H12N2O4S2 0,1 4,8 pK1= 1,04
A1703 (Ph. Eur.; USP)
L-Glutamine polar amino acid Gln, Q C5H10N2O3 26 (18°C) 5,65 pK1= 2,17
A3734 (BioChemica) MW = 146,15 45 (25°C) pK2= 9,13
A3704 (Cell culture) 100 (40°C)
A1420 (DAB; USP)
L-Glutamic acid acidic amino acid; negatively charged at neutral pH; polar Glu, E C5H9NO4 11 3,22 pK1= 2,19
A3712 (BioChemica) MW = 147,13 pK2= 4,25
A1704 (Ph. Eur.; USP)
Glycine polar and hydrophilic amino acid Gly, G C2H5NO2 225 5,97 pK1= 2,35
A4554 (Ph. Eur.; USP) MW=75,07 pK2=9,78
L-Histidine base basic amino acid; positively charged at neutral pH; essential His, H C6H9N3O2 42 7,59 pK1= 1,78
A3738 (BioChemica) MW = 155,16 pK2= 5,97
A1341 (Ph. Eur.; USP)
L-Histidine hydrochloride monohydrate His, H C6H9N3O2 • HCl • H2O 170-400
A3733 BioChemica) MW = 209,63
A1591 (Ph. Eur.; USP)
L-Hydroxyproline non-proteinogenic α-amino acid; major component of collagen and essential for its stability Hyp C5H9NO3 361 5,83 pK1= 1,82
A3742 (Cell culture) MW = 131,13 pK2= 9,65
A1705 (pure)
L-Isoleucine non-polar hydrophobic amino acid; aliphatic; essential Ile, I C6H13NO2 32 (20°C) 5,98 pK1= 2,32
A3642 (Cell culture) MW=131,17 pK2=9,76
A1440 (Ph. Eur.; USP)
L-Leucine non-polar hydrophobic amino acid; aliphatic; essential Leu, L C6H13NO2 24 (20°C) 6,02 pK1= 2,36
A3460 (BioChemica) MW = 131,17 pK2= 9,60
A1426 (Ph. Eur.; USP)
L-Lysine monohydrate basic amino acid; positively charged at neutral pH; hydrophilic; essential Lys, K C6H14N2O2 • H2O 300 9,74 pK1= 2,20
A1342 (DAB) MW=164,21 pK2=8,90
L-Lysine hydrochloride
Lys, K C6H14N2O2 • HCl 420
A3735 (BioChemica) MW = 182,65
A1706 (Ph. Eur.; USP)
L-Methionine non-polar hydrophobic amino acid; essential Met, M C5H11NO2S 48 (20°C) 5,74 pK1= 2,28
A1340 (Ph. Eur.; USP) MW = 149,21 pK2= 9,21
L-Ornithine hydrochloride non-proteinogenic α-amino acid; plays a role in the urea cycle C5H12N2O2 • HCl 100 pK1= 1,94
A3450 (BioChemica) MW = 168,62 pK2= 8,65
A1343 (DAB)
L-Phenylalanine non-polar aromatic amino acid; hydrophobic; essential Phe, F C9H11NO2 27 5,48 pK1= 2,20
A1344 (Ph. Eur.; USP) MW = 165,19 pK2= 9,31
L-Proline non-polar heterocyclic amino acid; highly water soluble Pro, P C5H9NO2 1500 6,3 pK1= 1,99
A3453 (BioChemica) MW = 115,13 pK2= 10,60
A3926 (Cell culture)
A1707 (Ph. Eur.; USP)
L-Serine polar and hydrophilic amino acid Ser, S C3H7NO3 364 (20°C) 5,68 pK1= 2,21
A1708 (Ph. Eur.; USP) MW = 105,09 pK2= 9,15
L-Threonine polar amino acid; essential Thr, T C4H9NO3 90 5,6 pK1= 2,15
A3969 (BioChemica) MW = 119,12 pK2= 9,12
A1419 (Ph. Eur.; USP)
L-Tryptophan non-polare aromatic amino acid; hydrophobic; essential Trp, W C11H12N2O2 11 5,89 pK1= 2,38
A3445 (BioChemica) MW = 204,23 pK2= 9,39
A1645 (Ph. Eur.; USP)
L-Tyrosine non-polare aromatic amino acid; hydrophobic Tyr, Y C9H11NO3 0,4 5,66 pK1= 2,20
A3437 (BioChemica) MW = 181,19 pK2= 9,11
A3401 (Cell culture)
A1677 (Ph. Eur.; USP)
L-Valine non-polare aliphatic amino acid; hydrophobic; essential Val, V C5H11NO2 85 5,96 pK1= 2,29
A3406 (Cell culture) MW = 117,15 pK2= 9,74
A1637 (Ph. Eur.; USP)

Abbreviation
MW = Molecular weight