Description_x000D_ Application_x000D_ Recommended as a cell culture substratum when using 0.5 ml of a 0.1 mg/ml solution to coat 25 cm2. Optimal conditions for attachment must be determined for each cell line and application._x000D_ Components_x000D_ Poly-L-lysine is a positively charged amino acid polymer with approximately one HBr per lysine residue. The hydrobromide allows the poly-L-lysine to be in a crystalline form soluble in water. A small amount of product may be found in the beta structure because the HBr interferes with hydrogen bonding between amino and either the carboxyl groups or N or O containing moieties._x000D_ Caution_x000D_ Sterile solutions are stable for up to 2 years when stored at 2-8°C. It should be stored desiccated at -20°C._x000D_ Analysis Note_x000D_ Molecular weight based on viscosity. Also assayed by MALLS._x000D_ Other Notes_x000D_ For additional technical information on polyamino acids please visit the Polyamino acid FAQ resource.