... 1 Molecular Weight,105.09 CAS No:56-45-1 Characteristics,White crystalline powder. L-Serine, serine, 56- ... +4), %≤0.02Other amino acidsNot detd.Usage: L-serine is a nonessential amino acid, it occurs ... naturally in an L-isomer form. L-serine is synthesized from glycine or theonine. ... of purines, pyrimidines, and other amino acids. L-serine plays a role in cell proliferation.Package ...