The neurotransmitter GABA [GAB-uh] is a gamma-type of this class of organic molecules, which were the most complex products of the Miller-Urey experiment. The substitution of 
The neurotransmitter GABA [GAB-uh] is a gamma-type of this class of organic molecules, which were the most complex products of the Miller-Urey experiment. The substitution of a polar one of these with valine in hemoglobin causes sickle-cell disease, and these molecules can be linked by disulfide bridges and (*) peptide bonds. These molecules are represented by codons and joined together during translation at the ribosome. For 10 points, name this group of 20 building blocks of proteins.
The neurotransmitter GABA [GAB-uh] is a gamma-type of this class of organic molecules, which were the most complex products of the Miller-Urey experiment.