Arginine derivatives Asparagine derivatives Aspartic acid derivatives Cysteine derivatives Glutamine derivatives Glutamic acid derivatives Glycine derivative Histidine derivatives Isoleucine derivatives Leucine derivatives Lysine derivatives Methionine derivatives Phenylalanine derivatives Proline derivatives Serine derivatives Threonine derivatives Tryptophan derivatives Tyrosine derivatives Valine derivatives Alanine derivatives Methionine derivatives BOC-amino acid Cbz-amino acid FMOC-amino acid α-Amino acid Other Amino Acid Protection Amino alcohol derivative Amino acid salts Amino acid esters Other amino acid derivatives Natural amino acids and derivatives
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Amino Acids and Derivatives

Arginine derivatives Asparagine derivatives Aspartic acid derivatives Cysteine derivatives Glutamine derivatives Glutamic acid derivatives Glycine derivative Histidine derivatives Isoleucine derivatives Leucine derivatives Lysine derivatives Methionine derivatives Phenylalanine derivatives Proline derivatives Serine derivatives Threonine derivatives Tryptophan derivatives Tyrosine derivatives Valine derivatives Alanine derivatives Methionine derivatives BOC-amino acid Cbz-amino acid FMOC-amino acid α-Amino acid Other Amino Acid Protection Amino alcohol derivative Amino acid salts Amino acid esters Other amino acid derivatives Natural amino acids and derivatives
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Amino acids and their derivatives belong to a compound containing both amino group and carboxyl group. They are presented in both the form of free-state and bound-state in vivo. Free amino acids are distributed in all kinds of animal cells and body fluids with the bound amino acids being the mainly basic components of proteins and peptides.

Natural amino acids act as colorless crystalline materials with relatively high melting points being mostly above 200 ℃. They are usually soluble in water but insoluble in non-polar organic solvents. However, tyrosine and cystine are insoluble in water; proline and hydroxyl proline are soluble in ethanol and ether. All amino acids are soluble in strong acid and alkali solution.

According to the polar characterization of the R group of the side chain of the α-amino acid; those 20 common amino acids that constitute protein can be divided into four groups:
① Amino acids with R group being non-polar; There are 8 kinds in total, wherein five kinds have aliphatic side chains, namely alanine, leucine, isoleucine, valine and proline; two kinds are aromatic amino acids, phenylalanine and tryptophan; one kind belongs to sulfur-containing amino acid, namely methionine; amino acids belonging to this group have lower water solubility than polar R-group amino acid; proline is generally different with α-amino acid, it is formed through the substitution of one hydrogen atom of the amino acid with the side chains of the α- amino acid, belonging actually to imino acid.
② Amino acids with polar but non-charged R group; There are seven kinds in total, namely serine, threonine and tyrosine with R group having hydroxy group; cysteine with R group having a mercapto group of cysteine; glutamine and asparagine with R-group containing amide group, another amino acid is glycine ; glycine molecule has no R group, but having certain polarity, and thus being classified into this group; the side chains in this group of amino acid contain unassociated polar groups and can form hydrogen bonds with water, and is easily soluble in water.
③Amino acids with R group being positively charged amino acids. There are three kinds in total, namely, lysine, arginine, and histidine; they carry positive charge at pH7.0 and are also known as alkaline amino acids.
④Amino acids with R group being negatively charged. There are two kinds in total, namely glutamate and aspartate; at pH7.0, the molecules are negatively charged, also known as acidic amino acids. The formula, abbreviations symbols and related constants of 20 kinds of amino acid structures can be seen from the table. In addition to the 20 common amino acids mentioned above, there are also diiodotyrosine, thyroxine, hydroxyproline and hydroxylysine existing in certain proteins. In addition to amino acids involved in protein composition, it has been also found of more than 200 kinds of other kinds amino acids in a variety of tissues and cells; these amino acids are mostly derivatives of those α- amino acid composition of proteins.

However, there are some β-, γ- or δ- amino acids and some amino acids belong to D-type amino acids such as [beta]-alanine, [gamma]-aminobutyric acid and the phenylalanine contained in the antibiotics gramicidin-S, the D-alanine and D-glutamate contained in Gram-positive bacteria cell wall. Some non-protein amino acids can act as metabolically important precursors or intermediates, wherein β-alanine is the precursors of vitamin pantothenic acid; ornithine, and citrulline are the precursors in the synthesis of arginine; [gamma]-aminobutyric acid is the chemical neurotransmitter. Plants contain a large amount of non-protein amino acids, belonging to plant secondary substances, such as theanine, canavanine, djenkolic acid, β- Cyanoalanine and so on.

In addition to 20 kinds of amino acids found in the body and animal protein products, it has been found of nearly 200 kinds of other kinds of amino acids in nature. Most of them have been discovered in the plant kingdom and have complex molecular structures with no relation with the protein metabolism. There have been less that have been seen in the animal kingdom with some of them being originated from the chemical modification of certain incorporated amino acids in the specific proteins, for example, the proline and lysine contained in collagen protein are often partially subject to re-hydroxylation of hydroxyproline and hydroxylysine; Another example is that there are often a small amount of lysine and histidine contained in actin and myosin protein containing hypermethylated εN methyl-lysine and 3N-histidine; it has been also found in the histone protein that the ∈ amino group contained in lysine is acetylated and the OH group in the serine is phosphorylated; thyroglobulin contains iodinated tyrosine and thyronine iodide; The heavy chain of τ myosin and the N-terminal of certain proteins contain pyroglutamate formed by glutamine; there also exists the cystine constituting of two cysteine molecules in the general protein.

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Chemical Name:
N-α-Methyl-DL-isoleucine
Structure:
Chemical Name:
(2S,3S)-3-phenylpyrrolidine-2-carboxylic acid
CAS:
51212-39-6
MF:
C11H13NO2
Chemical Name:
D-Aspartic Acid Calcium Chelate
Chemical Name:
5-Fluoro-2-Methoxy-DL-phenylalanine, JRD, 97%
Structure:
Chemical Name:
trans-4-(2-Methylbenzyl)-L-proline hydrochloride, 95%
MF:
C13H18ClNO2
Structure:
Chemical Name:
N-(4'-Methoxy-4-biphenylylsulfonyl)-beta-alanine, 96%
CAS:
885269-51-2
MF:
C16H17NO5S
Structure:
Chemical Name:
trans-4-(3-Cyanobenzyl)-L-proline hydrochloride, 95%
MF:
C13H15ClN2O2
Structure:
Chemical Name:
trans-N-Boc-4-(3-fluorobenzyl)-L-proline, 95%
MF:
C17H22FNO4
Structure:
Chemical Name:
trans-4-(2-Propynyl)-L-proline hydrochloride, 95%
MF:
C8H12ClNO2
Chemical Name:
5-Methyl-2-(trifluoroMethyl)-DL-phenylalanine, JRD, 97%
Structure:
Chemical Name:
N-(2,3,5,6-TetraMethylphenylsulfonyl)valine Monohydrate, 96%
CAS:
1009595-18-9
MF:
C15H23NO4S
Chemical Name:
N15 α-L-asparagine
Chemical Name:
Boc-L-(2-Thi)-Gly
Structure:
Chemical Name:
D-3,5-Dichlorophenylalanine
MF:
C9H9Cl2NO2
Chemical Name:
Fmoc-L-(3-Thi)-Gly
Chemical Name:
Fmoc-L-alpha-Methyl-phe
Chemical Name:
H-L-Norleucine(6-OBzl)
Chemical Name:
L-alpha-Methyl-4-F-Phe
Chemical Name:
D-homoleucine
Structure:
Chemical Name:
N-Acetyl-DL-Arginine
MF:
C8H16N4O3
Structure:
Chemical Name:
H-N-Me-D-Ala-OH.HCl
CAS:
1155878-14-0
MF:
C4H10ClNO2
Structure:
Chemical Name:
N-Methyl-N-(Methylsulfonyl)glycine
CAS:
115665-52-6
MF:
C4H9NO4S
Structure:
Chemical Name:
(R)-1-(Benzyloxycarbonyl)-2-Methylpyrrolidine-2-carboxylic acid
CAS:
63399-74-6
MF:
C14H17NO4
Structure:
Chemical Name:
(S)-N-FMoc-2-(2'--propynyl)alanine
CAS:
1198791-58-0
MF:
C21H19NO4
Structure:
Chemical Name:
N-Hexadecanoyl-D-alanine
CAS:
753018-28-9
MF:
C19H37NO3
Structure:
Chemical Name:
N-Hexadecanoyl-D-phenylglycine sodiuM salt
CAS:
1016315-49-3
MF:
C24H40NNaO3
Structure:
Chemical Name:
N-Octadecanoyl-L-phenylalanine
CAS:
37571-95-2
MF:
C27H45NO3
Structure:
Chemical Name:
N-Octadecanoyl-L-valine sodiuM salt
CAS:
85902-09-6
MF:
C23H46NNaO3
Structure:
Chemical Name:
S-Benzyl-L-cystein-S-oxide
CAS:
60668-81-7
MF:
C10H13NO3S
Structure:
Chemical Name:
N-[(9H-Fluoren-9-ylmethoxy)carbonyl]glycylglycylglycylglycine
CAS:
1001202-16-9
MF:
C23H24N4O7
Structure:
Chemical Name:
D-N-Benzylserine
CAS:
106910-77-4
MF:
C10H13NO3
Structure:
Chemical Name:
(R)-2-aMino-2-(tetrahydro-2H-pyran-4-yl)acetic acid hydrochloride
MF:
C7H14ClNO3
Chemical Name:
CefMenoxiMe Hcl Sterile
Chemical Name:
Boc-D-HoMoleucine
Structure:
Chemical Name:
S-Cyclopropylglycine Methyl ester hydrochloride
CAS:
138326-68-8
MF:
C6H12ClNO2
Structure:
Chemical Name:
(2S,3R)-Methyl 2-(((benzyloxy)carbonyl)aMino)-3-hydroxybutanoate
CAS:
100157-53-7
MF:
C13H17NO5
Structure:
Chemical Name:
Glycine, N-[2-(3,4-dihydro-5-Methyl-2,4-dioxo-1(2H)-pyriMidinyl)acetyl]-N-[2-[[(9H-fluoren-9-ylMethoxy)carbonyl]aMino]ethyl]-
CAS:
169396-92-3
MF:
C26H26N4O7
Structure:
Chemical Name:
N-Boc-2-(2-fluorobenzyl)-L-proline, 95%
MF:
C17H22FNO4
Structure:
Chemical Name:
N-(4'-Methoxy-4-biphenylylsulfonyl)-L-phenylalanine, 96%
MF:
C22H21NO5S
Structure:
Chemical Name:
7-AMINO-1,8-NAPHTHYRIDIN-2(8H)-ONE
CAS:
1931-44-8
MF:
C8H7N3O
Structure:
Chemical Name:
ETHYLENEDIAMINETETRAACETIC ACID DIAMMONIUM SALT MONOHYDRATE
CAS:
7379-26-2
MF:
C10H19N3O8
Chemical Name:
L-ALPHA-PHOSPHATIDYLSERINE, SPINAL CORD,BOVINE
Structure:
Chemical Name:
BOC-ALPHA-ALLYL-DL-PRO-OH
CAS:
315234-49-2
MF:
C13H21NO4
Structure:
Chemical Name:
3,5-DINITRO-L-TYROSINE MONOHYDRATE, 97
CAS:
71876-88-5
MF:
C9H11N3O8
Structure:
Chemical Name:
N-ACETYL-L-SELENOMETHIONIN
CAS:
210910-25-1
MF:
C7H13NO3Se
Structure:
Chemical Name:
N-[[2-[[3-(trifluoromethyl)phenyl]amino]pyridin-3-yl]carbonyl]glycine
CAS:
23869-84-3
MF:
C15H12F3N3O3
Structure:
Chemical Name:
Calcium dihydrogen di-L-aspartate
CAS:
39162-75-9
MF:
C4H9CaNO4
Structure:
Chemical Name:
O-benzyl-L-histidine bis(toluene-p-sulphonate)
CAS:
24593-59-7
MF:
C27H31N3O8S2
Chemical Name:
N-Boc-N-methyl-Val
Structure:
Chemical Name:
L-Proline, 1-methyl-5-oxo-, methyl ester (9CI)
CAS:
42435-88-1
MF:
C7H11NO3
Structure:
Chemical Name:
Benzoic acid, 5-amino-2,3-dichloro- (9CI)
CAS:
50917-32-3
MF:
C7H5Cl2NO2
Structure:
Chemical Name:
Benzoic acid, 2-amino-5-(1-pyrrolidinyl)- (9CI)
CAS:
159526-21-3
MF:
C11H14N2O2
Structure:
Chemical Name:
L-2,6-Dichlorophenylalanine
CAS:
111119-37-0
MF:
C9H9Cl2NO2
Structure:
Chemical Name:
ETHYL D-HOMOALANINATE HCL
MF:
C6H14ClNO2
Structure:
Chemical Name:
L-CYSTEINE HCL ANHYDROUS
MF:
C3H8ClNO2S
Chemical Name:
D-PRO-OBZL HCL
MF:
C12H15NO2.HCl
Structure:
Chemical Name:
ACETYLCYSTEINE IMPURITY C
MF:
C5H9NO3S
Structure:
Chemical Name:
MAGNESIUM ASPARTATE DIHYDRATE
CAS:
215533-00-9
MF:
C4H11MgNO5
Chemical Name:
N-Α-CBZ-L-ARGININE
MF:
C14H20N4O4
Chemical Name:
Ε-N-METHYL-L-LYSINE
Structure:
Chemical Name:
H-D-PHE-NH2 HCL
CAS:
71666-94-9
MF:
C9H13ClN2O
Structure:
Chemical Name:
bis(DL-methioninato-N,O)copper
CAS:
15170-74-8
MF:
C10H18CuN2O4S2
Structure:
Chemical Name:
L-lysine acetate
CAS:
52315-76-1
MF:
C6H14N2O2.xC2H4O2
Structure:
Chemical Name:
bis(5-oxo-L-prolinato-N1,O2)zinc
CAS:
15454-75-8
MF:
C10H12N2O6Zn
Structure:
Chemical Name:
N-2,4-DNP-L-tyrosine
MF:
C15H13N3O7
Structure:
Chemical Name:
N-CBZ-L-glutamic acid-5-t-butyl ester
MF:
C17H23NO6
Chemical Name:
OGP (Ostegenic Growth Peptide)
MF:
C49H70N14O11
Chemical Name:
SYK (Spleen tyrosine kinase)
Structure:
Chemical Name:
N-[[5-Chloro-2-(Methoxycarbonyl)-3-Thienyl]Sulfonyl]-N-Methylglycine Methyl Ester
MF:
C10H12ClNO6S2
Chemical Name:
β-thiolnorvaline
MF:
C5H11NO2S
Chemical Name:
DISODIUM HYDROGENATED TALLOW GLUTAMATE
Structure:
Chemical Name:
ETHYL LAUROYL ARGINATE HCL
CAS:
60372-77-2
MF:
C20H41ClN4O3
Structure:
Chemical Name:
METHYLSILANOL HYDROXYPROLINE
MF:
C6H13NO3Si
Structure:
Chemical Name:
Chromium Methionine
MF:
C15H30CrN3O6S3
Structure:
Chemical Name:
5-Isopropyl hydantoin
MF:
C6H10N2O2
Chemical Name:
L-Histidine-α-ketoglutarate
MF:
C11H15N3O7
Structure:
Chemical Name:
Potassium lauroylglutamate
MF:
C17H29K2NO5
Structure:
Chemical Name:
(R)-(+)-N-Boc-2-piperidinecarboxylic acid
MF:
C11H19NO4
Structure:
Chemical Name:
N-(4-AMinobenzoyl)-beta-alanine
MF:
C10H12N2O3
Structure:
Chemical Name:
N-Acetyl-d3-L-cysteine
CAS:
131685-11-5
MF:
C5H6D3NO3S
Structure:
Chemical Name:
FMOC-4-PIPERIDINO-L-PROLINE
CAS:
204318-02-5
MF:
C25H28N2O4
Chemical Name:
ACETYL-DL-o-FLUOROPHENYLALANINE, N-(RG)
Structure:
Chemical Name:
3-Quinolinecarboxylicacid,6-amino-1,2-dihydro-2-oxo-(9CI)
CAS:
85870-50-4
MF:
C10H8N2O3
Structure:
Chemical Name:
5-(METHYLAMINO)NICOTINIC ACID
MF:
C7H8N2O2
Structure:
Chemical Name:
(R)-3-Amino-3-(3-bromo-phenyl)-propanoic acid
MF:
C9H10BrNO2
Chemical Name:
Fenugreek seed(40% 4-OH-isoleucine)
Structure:
Chemical Name:
TFNG STANDARD
CAS:
207502-65-6
MF:
C9H7F3N2O3
Structure:
Chemical Name:
D-HOMOARGININE
CAS:
110798-13-5
MF:
C7H16N4O2
Structure:
Chemical Name:
D-Alanine, 3-[(phenylmethyl)amino]-
CAS:
119906-14-8
MF:
C10H14N2O2
Chemical Name:
MANGANESE AMINO ACID
Structure:
Chemical Name:
1-propionylpyrrolidine-2-carboxylic acid
CAS:
59785-64-7
MF:
C8H13NO3
Structure:
Chemical Name:
Cyclopropylalanine
CAS:
15785-52-1
MF:
C6H11NO2
Structure:
Chemical Name:
N-[(Phenylmethoxy)carbonyl]-L-valine 2-[(2-amino-1,6-dihydro-6-oxo-9H-purin-9-yl)methoxy]-3-(formyloxy)propyl ester
CAS:
194159-19-8
MF:
C23H28N6O8
Structure:
Chemical Name:
7-BROMO-D-TRYPTOPHAN
CAS:
496929-99-8
MF:
C11H11BrN2O2
Structure:
Chemical Name:
3,3,3-Trifluoroalanine ethyl ester hydrochloride
CAS:
193140-71-5
MF:
C5H8F3NO2.HCl
Chemical Name:
N-α-Methyl-D-Threonine
Chemical Name:
Boc-Phe-Tyr-OH
Chemical Name:
Cbz-D-tert-leucine.DCHA
Chemical Name:
N-α-methyl-L-Phenylalanine
Structure:
Chemical Name:
L-Aspartate-4-semialdehyde
CAS:
2338-03-6
MF:
C4H7NO3