Proline
 
Abbreviations: Pro, P 
Properties
Class: Aliphatic, hydrophobic  
pK(COO-):  1.99 
pK(NH3+): 10.96 
pK(R): 
pI: 6.48 
MW: 115 D 
Occurence in Proteins: 4.6% 
 
 
 
Characteristics
 
 high occurence in beta bend