The Early Earth Atmosphere and Early Life Catalysts - The Metal-Driven Biogeochemistry of Gaseous Compounds in the Environment - page 8

Table 2 Side chain residues (R) of the twenty standard amino acids, H 2 N-CH(R)-COOH. a

Non polar

CH 3 CH CH 3 CH 2

H

H H 2 C CH 3

Alanine/Ala/A

CH 3 CH CH 3

Glycine/Gly/G

CH 3

Valine/Val/V

CH 3

Leucine/Leu/L

Isoleucine/Ile/I

CH 2

CH 2 CH 2 CH 2

SH CH 2

Proline/Pro/P Cysteine/Cys/C

S

HN

CH 3

Methionine/Met/M Phenylalanine/Phe/P Tryptophan/Trp/W