Table 2 Protonic structure of amino acid radicals
From: Primary structure of proteins as a nanowire for metabolic electronic transport
Number | Amino acid | n H | n a | Δ ( N H / N a ) | Chemical formula of radical |
|---|---|---|---|---|---|
1 | Glycine | 1 | 0 | −1/4 | -H |
2 | Alanine | 3 | 1 | 0 | -CH3 |
3 | Valine | 5 | 2 | +1/6 | -CH-2(CH3) |
4 | Leucine | 9 | 4 | +3/8 | -CH2-CH-CH3-CH3 |
5 | Isoleucine | 9 | 4 | +3/8 | -CH-CH3-CH2-CH3 |
6 | Phenylalanine | 7 | 7 | −2/11 | -CH2- |
7 | Tryptophan* | 8 | 10 | −2/7 | -CH2- |
8 | Serine* | 3 | 2 | −1/6 | -CH2-OH |
9 | Threonine* | 5 | 3 | 0 | -CH-CH3-OH |
10 | Methionine | 7 | 4 | +1/8 | -CH2-CH2-S-CH3 |
11 | Cysteine* | 3 | 2 | −1/6 | -CH2-S-H |
12 | Glutamine* | 6 | 5 | −1/9 | -CH2-CH2-CO-NH2 |
13 | Asparagine* | 4 | 4 | −1/4 | -CH2-CO-NH2 |
14 | Aspartic acid (−) | 3 | 4 | −3/8 | -CH2-COOH(−COO−) |
15 | Glutamic acid (−) | 5 | 5 | −2/9 | −2(CH2)-COOH(−COO−) |
16 | Tyrosine (−) | 7 | 8 | −1/4 | -CH2- |
17 | Histidine (+) | 6 | 6 | −1/5 | + -CH2- |
18 | Lysine (+) | 10 | 5 | +1/3 | −4(CH2)-NH2(−NH3 +) |
19 | Arginine (+) | 12 | 7 | +3/11 | −3(CH3)-NH-CNH-NH(−NH2 +) |
-OH (−O−)