Primary structure of proteins as a nanowire for metabolic electronic transport

Table 1 Electronic-atomic structure of amino acid radicals

Number	Amino acid	n _e	n _a	Δ ( N _e / N _a )	Chemical formula of radical
1	Glycine	1	0	−1/2	-H
2	Alanine	9	1	−2/5	-CH₃
3	Valine	17	2	−1/3	-CH-2(CH₃)
4	Leucine	33	4	−1/4	-CH₂-CH-CH₃-CH₃
5	Isoleucine	33	4	−1/4	-CH-CH₃-CH₂-CH₃
6	Phenylalanine	49	7	−10/11	-CH₂-
7	Tryptophan*	69	10	−1	-CH₂-
8	Serine*	17	2	−1/3	-CH₂-OH
9	Threonine*	25	3	−2/7	-CH-CH₃-OH
10	Methionine	41	4	+3/4	-CH₂-CH₂-S-CH₃
11	Cysteine*	25	2	+1	-CH₂-S-H
12	Glutamine*	39	5	−4/9	-CH₂-CH₂-CO-NH₂
13	Asparagine*	31	4	−1/2	- CH₂-CO-NH₂
14	Aspartic acid (−)	31	4	−1/2	-CH₂-COOH (−COO⁻)
15	Glutamic acid (−)	39	5	−4/9	−2(CH₂)-COOH(−COO⁻)
16	Tyrosine (−)	57	8	−5/6	-CH₂--OH (−O⁻)
17	Histidine (+)	44	6	−7/10	+ -CH₂-
18	Lysine (+)	41	5	−2/9	−4(CH₂)-NH₂ (−NH₃ ⁺)
19	Arginine (+)	57	7	−2/11	−3(CH₃)-NH-CNH-NH (−NH₂ ⁺)

Notes of Table 1: The asterisks denote the polar radicals. The ‘+’ or ‘−’ corresponds to the type of charge on the radical and approximate place of its location. Hexagons had shown benzene rings, and pentagons had shown groups of atoms, which have the following composition. In the case of tryptophan, the lower left vertex is a carbon atom, the left-side vertex is a group of CH, the upper vertex has a group of NH, and two common to both rings, the vertices have only carbon atoms. All other vertices, as it should be for benzene, contain groups of CH. In case of histidine, the imidazole ring, starting from the bottom-left vertex counterclockwise, has groups: C, NH, CH, NH, CH.