文档介绍：Amino acids and structure
acids and bases
Protein structure
myoglobin and hemoglobin
collagen
Protein purification
Chromatography of proteins
Electrophoresis of proteins
Protein sequencing
B Amino acids and protein
Amino Acid
Stereoisomers (stereo-isomer)
The 20 standard amino acids
Ionization
B1 Amino acids
Basic Structure of an amino acid
COO-
NH3+ C H
R
COO-
H C NH3+
R
L-Amino acid
D-Amino acid
The two enantiomers
Enantiomers
Enantiomers are molecules that have  opposite spatial configuration are said to be optically active.
One enantiomer will rotate polarized light a set number of degrees to the right. This is called the dextrorotatory isomer or (+) isomer.
The other enantiomer will rotate the plane polarized light the same number of set degrees in the opposite left direction. This isomer is said to be a levorotatory isomer or (-) isomer.
The two enantiomers
The 20 standard amino acids
Hydrophobic aliphatic amino acids
Hydrophobic aromatic amino acids
Polar charged amino acids
Polar uncharged amino acids
Hydrophobic aliphatic amino acids
Gly :甘氨酸
H
H2N
COOH
H
C
glycine
Hydrophobic aliphatic amino acids
Ala:丙氨酸
CH3
H2N
COOH
H
C
alanine
Hydrophobic aliphatic amino acids
Val:缬氨酸
H
H3C C CH3
H2N C COOH
H
valine