Fractogel EMD SO₃⁻ (M)

Strong cation exchange Fractogel^® resin featuring the tentacle technology, for purification of basic and neutral proteins (e.g. antibodies) and peptides

Fractogel^® EMD SO₃^- (M) enables:

• Increased binding strength at low pH
• High aggregate removal efficiency combined with high dynamic binding capacity
• Lower elution volumes for the highest purity levels
• Compatibility with 2.5 % (v/v) aqueous benzyl alcohol containing 150 mM NaCl storage solution

Due to the titration behavior, the ion exchange capacity can be used from pH 2 to pH 12. The separation of proteins is based on reversible electrostatic interactions between the surface′s positively charged regions and the support. Proteins are retained efficiently on Fractogel^® EMD SO₃^- (M) when the pH of the buffer is about 1 unit below their isoelectric points (pl).

The strength of the binding depends on the following:

• the buffer system
• pH value of the buffer which determines the surface charge of the protein
• the concentration of the counter ions
• the charge density on the support (protein binding capacity)

Plastic bottle

Appearance: Milky turbid suspension,free from impurities(foreign particles)
Microscopic evaluation: Uniform spherical particles,no agglomerates, no fines
Extractable matter (water): ≤ 0.05 %
Cerium: ≤ 1 µg/g
Pressure drop(column: ID=1.6 cm, L=10 cm at 5 ml/min): ≤ 1.0 bar
Particle size (d10): 37 - 45 µm
Particle size (d50): 48 - 60 µm
Particle size (d90): 63 - 77 µm
Colony forming units (TAMC + TYMC): ≤ 100 CFU/ml
Endotoxins: ≤ 1.00 EU/ml
Protein binding capacity (lysozyme): 110 - 150 mg/ml
Functional test (b:a): ≤ 0.4
Functional test (c:d): ≤ 0.45
Functional test: Separation chymotrypsinogen A, cytochrom C and lysozyme

FRACTOGEL is a registered trademark of Merck KGaA, Darmstadt, Germany