(S)-β-Aminoisobutyric acid hydrochloride is a non-protein amino acid originating from the catabolism of thymine and valine[1].
References:
[1].CRUMPLER HR, et al. beta-Aminoisobutyric acid (alpha-methyl-beta-alanine); a new amino-acid obtained from human urine. Nature. 1951 Feb 24;167(4243):307-8.
















