BYU Home page BRIGHAM YOUNG UNIVERSITY  
Search the Bio Lab:
Contact   |   Help
Navigation Menu

[expand all...]
[COLAPSE ALL...]



Ionization constants and pH values at the isoelectric point of α-amino acis in water at 25C

pKa Values
Amino Acid carboxyl group(-COOH) ammonium ion(-NH3+) Side Chain Isoelectric point pI
Ala 2.35 9.87 - 6.11
Gly 2.35 9.78 - 6.06
Arg 2.01 9.04 12.48 10.76
Asp 2.10 9.82 3.86 2.98
Glu 2.10 9.47 4.07 3.08
His 1.77 9.18 6.10 7.64
Asp 2.10 9.82 3.86 2.98
Lys 2.18 8.95 10.53 9.47
Tyr 2.20 9.11 10.07 5.63
Cys 1.04 2.05 8.0, 10.25 5.02
Taken from Pethig p.73
Maintained by ECEn IMMERSE Web Team.
Copyright © 1994-2010. Brigham Young University. All Rights Reserved.