Ch27 PKa And PI Values - Chemistry - University Of Calgary

Trang chủ » Nh2 Nh3+ Pka » Ch27 PKa And PI Values - Chemistry - University Of Calgary

Có thể bạn quan tâm

Return to Contents Chapter 27: Amino Acids, Peptides and Proteins Ch 27 contents

Table of pKa and pI values

  • The pKa values and the isoelectronic point, pI, are given below for the 20 α-amino acids.
  • pKa1= α-carboxyl group, pKa2 = α-ammonium ion, and pKa3 = side chain group.
Amino acid pKa1 pKa2 pKa3 pI
Glycine 2.34 9.60 --- 5.97
Alanine 2.34 9.69 --- 6.00
Valine 2.32 9.62 --- 5.96
Leucine 2.36 9.60 --- 5.98
Isoleucine 2.36 9.60 --- 6.02
Methionine 2.28 9.21 --- 5.74
Proline 1.99 10.60 --- 6.30
Phenylalanine 1.83 9.13 --- 5.48
Tryptophan 2.83 9.39 --- 5.89
Asparagine 2.02 8.80 --- 5.41
Glutamine 2.17 9.13 --- 5.65
Serine 2.21 9.15 --- 5.68
Threonine 2.09 9.10 --- 5.60
Tyrosine 2.20 9.11 --- 5.66
Cysteine 1.96 8.18 --- 5.07
Aspartic acid 1.88 9.60 3.65 2.77
Glutamic acid 2.19 9.67 4.25 3.22
Lysine 2.18 8.95 10.53 9.74
Arginine 2.17 9.04 12.48 10.76
Histidine 1.82 9.17 6.00 7.59
previous page next page
organic chemistry © Dr. Ian Hunt, Department of Chemistry University of Calgary

Từ khóa » Nh2 Nh3+ Pka