P7890

Poly-L-lysine hydrobromide

mol wt 15,000-30,000 by viscosity

• Synonyma: L-Lysine homopolymer hydrobromide
• Číslo CAS: 25988-63-0
• UNSPSC Code: 12352209
• eCl@ss: 32160406
• PubChem Substance ID: 24898886
• NACRES: NA.26
• MDL number: MFCD00237230

Vlastnosti

• form: powder
• Quality Segment: 200
• mol wt: 15,000-30,000 by viscosity
• color: white to off-white
• application(s): cell analysis
• storage temp.: −20°C
• SMILES string: Cl.NCCCCC(N)C(O)=O
• InChI: 1S/C18H38N6O4/c19-10-4-1-7-13(22)16(25)23-14(8-2-5-11-20)17(26)24-15(18(27)28)9-3-6-12-21/h13-15H,1-12,19-22H2,(H,23,25)(H,24,26)(H,27,28)/t13-,14-,15-/m0/s1
• InChI key: WBSCNDJQPKSPII-KKUMJFAQSA-N

Popis

Application

Poly-L-lysine polymers can be used in promoting cell adhesion to solid substrates, conjugation to methotrexate for increased drug transport, microencapsulation of islets, cell microencapsulation technology, microarray glass slide coating, and chromosomal preparations. Lower molecular weight poly-L-lysine (30,000-70,000) is less viscuous in solution, but higher molecular weight versions provide more attachment sites per molecule.

Biochem/physiol Actions

Poly-L-lysine is a nonspecific attachment factor for cells useful in promoting cell adhesion to solid substrates by enhancing electrostatic interaction between negatively charged ions of the cell membrane and the culture surface. When it is absorbed to the cell culture surface, poly-L-lysine functions to increase the number of positively charged sites available for cell binding. With cells that can digest poly-L-lysine, poly-D-lysine should be used as the attachment factor.

Preparation Note

This product has a molecular weight of 15,000-30,000. To remove the HBr, dissolve this product in a neutral buffer and dialyze to remove the salts. None of the poly-L-lysine products have been exposed to trifluoroacetic acid and are dialyzed to remove any monomers, dimmers, or trimers, confirmed by thin layer chromatography. In general, to use this product as an attachment factor, add 50 mL of sterile tissue culture grade water to 5 mg of poly-lysine, and aseptically coat the surface with 1 mL per 25 cm² of solution. After 5 minutes, remove the solution through aspiration and thoroughly rinse the surface. Let dry for two hours before introducing cells and medium.

Analysis Note

Molecular weight based on viscosity and was also assayed by MALLS.

Other Notes

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.

Disclaimer

Sterile solutions are stable for up to 2 years when stored at 2-8°C. It should be stored desiccated at -20°C.

Bezpečnostní informace

• Skladovací třída: 11 - Combustible Solids
• Co se děje?: WGK 3
• Bod vzplanutí (°F): Not applicable
• Bod vzplanutí (°C): Not applicable
• PPE (osobní ochranné prostředky): Eyeshields, Gloves, type N95 (US)