: T 1696 (OTTO) DL-Threonine, for biochemistry, 99%+ Cas 80-68-2 - used as a polar essential amino acid. It serves as a precursor of glycine as well as used in the biosynthesis of proteins. T 1696 (OTTO) DL-Threonine, for biochemistry, 99%+ Cas 80-68-2 - used for biochemical research.