Arginine
 
Abbreviations: Arg, R
Properties
Class: Positively-charged, basic 
pK(COO-):  2.17
pK(NH3+): 9.04
pK(R): 12.48
pI: 10.76
MW: 174 D 
Occurence in Proteins: 4.7% 
 
 
 
Characteristics