subsequently , rigid cyclopentane and cyclohexane amino acid analogues were applied by iontophoresis and their relative efficacies were compared with those of the naturally occurring amino acids.2 gaba was the most effective of the small aliphatic amino acids in producing inhibition of the firing of hippocampal pyramidal neurones . beta-alanine was less effective and glycine was the least effective .
C0002520
amino
C0000392
beta-alanine