Nomenclature and Symbolism for Amino Acids and Peptides

3AA-12.2. Ionized Forms of Residues

This version of 3AA-12.2 does not use the HTML table format.

When it is desirable to mention or emphasize the particular ionic form of a residue, this may be done as follows

 Name of residue    Protonated Form          Deprotonated form 
 
 arginine residue   argininium residue       arginine (base) residue 
 
 histidine residue  histidinium residue      histidine (base) residue 
 
 lysine residue     lysinium residue         lysine (base) residue 
 
 aspartic residue   aspartic (acid) residue  aspartate residue 
 
 cysteine residue   cysteine (acid) residue  cysteinate residue 
 
 glutamic residue   glutamic (acid) residue  glutamate residue 
 
 tyrosine residue   tyrosine (acid) residue  tyrosinate residue 
This system cannot easily be applied to N- or C-terminal residues.


Return to 3AA-12.3.