| Serine (abbreviated as Ser or S)[3] encoded by the codons UCU, UCC, UCA, UCG, AGU and AGC is an a-amino acid that is used in the biosynthesis of proteins. It contains an alpha-amino group (which is in the protonated -NH+ 3 form under biological conditions), a carboxyl group (which is in the deprotonated -COO- form in physiological conditions), and a side chain consisting of a hydroxymethyl group (see hydroxyl), classifying it as a polar amino acid. It can be synthesized in the human body under normal physiological circumstances, making it a nonessential amino acid. Synonyms: L-Ser-OH, (-)-Serine, (S)-2-Amino-3-hydroxypropanoic Acid, (S)-Serine, (S)-alpha-Amino-beta-hydroxypropionic Acid, 1: PN: US20090069547 PAGE: 10 claimed protein, 225: PN: EP2071334 SEQID: 242 claimed protein, 225: PN: WO2009077864 SEQID: 242 claimed protein, 6: PN: WO2012061268 SEQID: 6 claimed protein, L-(-)-Serine, L-3-Hydroxy-2-aminopropionic Acid, 3-Hydroxy-L-alanine, L-Ser, beta-Hydroxy-L-alanine CAS No: 56-45-1 Molecular Formula: C3H7NO3 Molecular Weight: 105.09 Purity: 98.5% (Titration, anhydrous) Appearance: White crystalline powder Related Substances (Chromatographic impurity): Individual impurity: 0.5% Total impurities: 2.0% Optical Rotation [a]D25: +14.0 to +15.6 Infrared Spectrum: Conforms to structure Melting Point: 222C (dec) (lit) pH: 5.2-6.2 Loss on Drying: 0.2% Residue on Ignition: 0.1% Heavy Metals (Pb): 0.0015% Iron: 0.003% Chloride: 0.05% Sulfate: 0.03% Endotoxin: 0.5EU/mg STORAGE and Stability: Store at 4C. Stable for 12 months after receipt. Meets or exceeds USP Specifications |
