SIMONAPreprocessor
3-Letter-Code / 1-Letter-Code

3-Letter-Code and 1-Letter-Code are abbreviations for amino acids. 3-Letter-Code is used for general abbreviation; 1-Letter-Code is usually used in amino acid sequences.

$ \begin{tabular}{c|c|c|c|c|c} \bf Amino Acid & \bf 3-Letter-Code & \bf 1-Letter-Code & \bf Side-chain \newline polarity & \bf Side-chain \newline charge (pH 7.4) & \bf Hydropathy \newline index\\ \hline \hline Alanine & Ala & A & nonpolar & neutral & 1.8\\ \hline Arginine & Arg & R & polar & positive & -4.5\\ \hline Asparagine & Asn & N & polar & neutral & -3.5\\ \hline Aspartic acid & Asp & D & polar & negative & -3.5\\ \hline Cyteine & Cys & C & polar & neutral & 2.5\\ \hline Glutamic acid & Glu & E & polar & negative & -3.5\\ \hline Glycine & Gly & G & nonpolar & neutral & -0.4\\ \hline Histidine & His & H & polar & positive(10\%) & -3.2\\ & & & & neutral(90\%) & \\ \hline Isoleucine & Ile & I & nonpolar & neutral & 4.5\\ \hline Leucine & Leu & L & nonpolar & neutral & 3.8\\ \hline Lysine & Lys & K & polar & positive & -3.9\\ \hline Methionine & Met & M & nonpolar & neutral & 1.9\\ \hline Pheylalanine & Phe & F & nonpolar & neutral & 2.8\\ \hline Proline & Pro & P & nonpolar & neutral & -1.6\\ \hline Serine & Ser & S & polar & neutral & -0.8\\ \hline Threonine & Thr & T & polar & neutral & -0.7\\ \hline Tryptophan & Trp & W & nonpolar & neutral & -0.9\\ \hline Tyrosine & Tyr & Y & polar & neutral & -1.3\\ \hline Valine & Val & V & nonpolar & neutral & 4.2\\ \end{tabular} $