Page 102 - BUKU AJAR BIOKIMIA 1 K5FN

Tabel 11 Sifat-sifat Asam Amino
Asam Amino
Nonpolar, Gugus R Alifatik Glisin
Alanin Prolin Valin Leusin Isoleusin Metionin
Gugus R Aromatik Fenilalanin
Tirosin Triptofan
Polar, Gugus R tidak bermuatan Serin
Treonin Sistein Asparagin Glutamin
Gugus R bermuatan positif Lisin
Histidin Arginin
Gugus R bermuatan negative Aspartat
Singkatan/ Simbol
Gly (G) Ala (A) Pro (P) Val (V) Leu (L) Ile (I) Met (M)
Phe (F) Try (Y) Trp (W)
Ser (S) Thr (T) Cys (C) Asn (N) Gln (Q)
Lys (K) His (H) Arg (R)
Asp (D)
Nilai pKa
Mr* pK1 pK2 pKR (-COOH) (-NH3+) (Gugus
R)
Indeks hidropati†
-0.4 1.8 -1.6 4.2 3.8 4.5 1.9
2.8 -1.3 -0.9
PI
Keberadaan dalam Protein (%)‡
7.2 7.8 5.2 6.6 9.1 5.3 2.3
3.9 3.2 1.4
-0.8 6.8 -0.7 5.9 2.5 1.9 -3.5 4.3 -3.5 4.2
-3.9 5.9 -3.2 2.3 -4.5 5.1
-3.5 5.3 -3.5 6.3
75 2.34 9.60 5.97
89 2.34 9.69 6.01 115 1.99 10.96 6.48 117 2.32 9.62 5.97 131 2.36 9.60 5.98 131 2.36 9.68 6.02 149 2.28 9.21 5.74
165 1.83 9.13 5.48 181 2.20 9.11 10.07 5.66 204 2.38 9.39 5.89
105 2.21 9.15
119 2.11 9.62
121 1.96 10.28 8.18 132 2.02 8.80
146 2.17 9.13
146 2.18 8.95 10.53
155 1.82 9.17 6.00
174 2.17 9.04 12.48 10.76
133 1.88 9.60 3.65 2.77
5.68 5.87 5.07 5.41 5.65
9.74 7.59
Glutamat
Sumber: Nelson & Cox, 2013
Glu (E)
147 2.19 9.67 4.25 3.22
99