N-terminal modification

Acetyl, formyl, [ac], [for]  

Aminooxyacetyl, [aoa]  

Azide, [N3]  

Pyroglutamate, [pyr]  

S-acetylthioacetate, [sata]  

Succinyl, [suc]  


C-terminal modification

Amide, [NH2]  

Alkylester, [COOMe], [COOEt]  

Cysteamide, [cya]  

Ethylenediamine, [ed]  

Hydroxysucinimide ester, [Osu]  

N-methylamide, [NHMe]  


Non-standard residues

Aminoisobutyric acid, [aib]  

Beta aspartic acid, [beta D]  

Beta homo amino acids, [beta homo-aa]  

Beta-alanine, [beta A]  

Citrulin, [cit]  

Cyclohexylalanine, [cha]  

D amino-acids, [d-aa]  

Dihydroxyphenylalanine, [dopa]  

Epsilon lysine, [epsilon K]  

Fluoro-, chloro-, bromo phenylalanine, [x-F]  

Fluoro-, chloro-, bromo tyrosine, [x-Y]  

Gamma glutamic acid [gamma E]  

Heavy isotope (13C, 15N) labeled amino-acids  

Hydroxyproline, [hyp]  

Methyl-, acetyl-lysine [meK], [acK]  

N-methyl amino-acids, [N-Me-aa]  

Norleucine, [nle]  

Pencillinamine, [pen]  

Phosphorylation [pS], [pT], [pY]  


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