LForm Amino Acid Structure Carboxylic group Amino group
L-Form Amino Acid Structure Carboxylic group Amino group + H 3 N R group a COO - H H = Glycine CH 3 = Alanine Juang RH (2004) BCbasics
Mirror Images of Amino Acid a Mirror image a Same chemical properties Stereo isomers Juang RH (2004) BCbasics
Northwest line Chung-San line = -C-C-C-N N+ Basic Arg R Aromatic Trp W -C-OH Tyr Y Lys K + -C-CONH 2 -C-C-CONH 2 Nan-Kan Asn N Gln Q Amide Asp D Glu E Acidic -C-COOH -C-C-COOH Phe F Ala A A Val V Ile I -H -CH 3 C C -C-C-C Ser S Cys C -C-SH Circular line South line -C-C OH Thr T Met M Hydroxy Sulfur -C-C-S-C Pro P Aliphatic Leu L C -C-C-C C HN C C C-COOH a Imino, Circular Juang RH (2004) BCbasics H Gly G -C-OH Nonpolar Polar line -C-C C His N N+ Central line This is NOT a metabolic pathway N -C-C-C-C-NH 3 Amino Acid Subway Map
Classification of Amino Acids by Polarity NONPOLAR Acidic Neutral Basic Asp Asn Ser Arg Cys Tyr His Gln Thr Lys Glu Gly Ala Ile Phe Trp Val Leu Met Pro Polar or non-polar, it is the bases of the amino acid properties. Juang RH (2003) Biochemistry
Formation of Peptide Bonds by Dehydration Amino acids are connected head to tail NH 2 1 COOH NH 2 2 COOH Dehydration Carbodiimide -H 2 O O NH 2 1 C N H 2 COOH Juang RH (2004) BCbasics
Peptide Bond Is Rigid and Planar C H C O N C Juang RH (2004) BCbasics
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