Product Description Lysine (abbreviated as Lys or K) is an α-amino acid with the chemical formula HO2CCH(NH2)(CH2)4NH2. This amino acid is an essential amino acid, which means that humans cannot synthesize it. Its codons are AAA and AAG. Lysine is a base, as are arginine and histidine. The ε-amino group acts as a site for hydrogen binding and a general base in catalysis. Common posttranslational modifications include methylation of the ε-amino group, giving methyl-, dimethyl-, and trimethyllysine. The latter occurs in calmodulin. Other posttranslational modifications include acetylation. Collagen contains hydroxylysine which is derived from lysine by lysyl hydroxylase. O-Glycosylation of lysine residues in the endoplasmic reticulum or Golgi apparatus is used to mark certain proteins for secretion from the cell. BASIC ANALYSIS Analysis Description Test Method Assay (dry basis) 99.0～101.0% HPLC Loss on drying Not More Than 0.20% Dryer Residue on ignition Not More Than 0.10% Ph. Eur. Related substances Not More Than 0.1% Ph. Eur. Endotoxin* Less Than 6.0 EU/g Ph. Eur. State of solution(Transmittance) Not Less Than 98.0% Ph. Eur. PH 6.5~7.5  Ph. Eur. Specific rotation[α]20D +8.5～+10.0°  Ph. Eur. Specific rotation[α]25D +8.4～+9.9°  Ph. Eur. Ammonium (NH4) Not More Than 0.020%   Ph. Eur. Chloride (Cl) Not More Than 0.020%  Ph. Eur. Sulfate (SO4) Not More Than 0.020%  Ph. Eur. Iron (Fe) Not More Than 10 ppm ICP-MS/AOAC 993.14 Arsenic (As) < 1 ppm ICP-MS/AOAC 993.14 Cadmium (Cd) < 2 ppm ICP-MS/AOAC 993.14 Heavy metals (Pb) Not More Than 10 ppm ICP-MS/AOAC 993.14 Mercury (Hg) < 0.5 ppm ICP-MS/AOAC 993.14 Microbial Analysis Total Plate Count < 3,000 cfu/g AOAC 990.12 Total Yeast & Mold < 300 cfu/g AOAC 997.02 E. Coli < 10 cfu/g AOAC 991.14 Coliforms < 10 cfu/g AOAC 991.14 Salmonella Negative ELFA-AOAC Staphylococcus < 10 cfu/g AOAC 2003.07 Function An acetate salt of L-lysine. L-Lysine is an essential amino acid in human. It is metabolized to acetyl-CoA. It is widely used as an ingredient in infusion.