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P0296

Sigma-Aldrich

Poly-D-lysine hydrobromide

mol wt 1,000-5,000

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Synonym(s):
D-Lysine homopolymer hydrobromide
Linear Formula:
D-Lys-(D-Lys)n-D-Lys · xHBr
CAS Number:
27964-99-4
MDL number:
MFCD00131934
PubChem Substance ID:
24898091
NACRES:
NA.26

form

powder or solid

mol wt

1,000-5,000

technique(s)

cell culture | mammalian: suitable

color

white to faint yellow

storage temp.

−20°C

SMILES string

O=C(C)[C@@](NC)([H])CCCCN.[Br]

InChI

1S/C6H14N2O2.BrH/c7-4-2-1-3-5(8)6(9)10;/h5H,1-4,7-8H2,(H,9,10);1H

InChI key

MEXAGTSTSPYCEP-UHFFFAOYSA-N

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P1024P0899P7886
Poly-D-lysine hydrobromide mol wt 1,000-5,000

Sigma-Aldrich

P0296

Poly-D-lysine hydrobromide

Poly-D-lysine hydrobromide mol wt ≥300,000

Sigma-Aldrich

P1024

Poly-D-lysine hydrobromide

Poly-D-lysine hydrobromide mol wt 70,000-150,000

Sigma-Aldrich

P0899

Poly-D-lysine hydrobromide

Poly-D-lysine hydrobromide mol wt 30,000-70,000

Sigma-Aldrich

P7886

Poly-D-lysine hydrobromide

technique(s)

cell culture | mammalian: suitable

technique(s)

cell culture | mammalian: suitable

technique(s)

cell culture | mammalian: suitable

technique(s)

cell culture | mammalian: suitable

color

white to faint yellow

color

white to off-white

color

white to off-white

color

white to off-white

storage temp.

−20°C

storage temp.

−20°C

storage temp.

−20°C

storage temp.

−20°C

mol wt

1,000-5,000

mol wt

≥300,000

mol wt

70,000-150,000

mol wt

30,000-70,000

Application

Poly-D-lysine polymers can be used in preparing surfaces for cell attachment. The D-lysine polymers can also be used with cells that digest poly-L-lysine polymers and cause an excessive uptake of L-lysine.

This product is recommended as a cell culture substratum when using 0.5 - 1.0 mL of a 0.1 mg/mL solution to coat 25 cm2. Lower molecular weight versions of the product are less viscous, but high more molecular weight versions provide more attachment sites per molecule.

Biochem/physiol Actions

This product 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. After absorption to the culture surface, poly-D-lysine increases the number of positively charged cell binding sites.

Components

Poly-D-lysine is a positively charged amino acid polymer with approximately one HBr per lysine residue. The hydrobromide allows the poly-D-lysine to be in a crystalline form soluble in water. A small amount of product may be found in the ß structure because the HBr interferes with hydrogen bonding between amino and either the carboxyl groups or N or O containing moieties.

Caution

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

Analysis Note

This product has a molecular weight of 1,000-4,000. To remove the HBr, dissolve this product in a neutral buffer and dialyze to remove the salts. 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.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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