PROTAA-RO

Protein A Agarose

>98% (HPLC and SDS-PAGE), suspension

• Synonym(s): agarose, protein a

Properties

• Assay: >98% (HPLC and SDS-PAGE)
• form: suspension
• packaging: pkg of 15 mL (05015979001 [settled resin volume]); pkg of 2 mL (11719408001 [settled resin volume]); pkg of 5 mL (11134515001 [settled resin volume])
• manufacturer/tradename: Roche
• capacity: >18 mg/mL binding capacity (human IgG (polyclonal))(the IgG is loaded at pH 7.4 and eluted with 200 mM glycine, pH 2.0)
• storage temp.: 2-8°C

Description

General description

The use of recombinant Protein A in the production of Protein A agarose has the advantage that it is entirely free from Staphylococcal enterotoxins that are known to be mitogenic, and are contaminants in Protein A isolated from S. aureus. The immobilization chemistry provides high IgG-binding capacity and leak-proof stability under a wide range of pH and buffer conditions. The gel can be used over 30 times, depending on the elution condition.

Protein A leakage: <18 ng Protein A/ml (ELISA)
Regeneration: the gel can be used approximately 30 times
Structure: recombinant Protein A (E. coli, Mr = 45,000) is covalently coupled to crosslinked 6% agarose beads: 3 mg Protein A (>98% pure, HPLC, SDS-Page)/1 ml gel
Protein A, immobilized.

Specificity

Protein A is a cell wall protein, isolated from a specific bacterial strain, which has specific binding sites for certain classes of immunoglobulins from different species. Protein A binds to varying degrees IgM, IgA, IgD, and most subclasses of IgG.

Application

Purification of mouse monoclonal antibodies from ascites fluid or cell culture supernatants. Protein A or Protein G Agarose affinity matrix can be used to purify antibodies from crude cell extracts and for the immunoprecipitation or co-immunoprecipitation of proteins. It has also been used for photoactivatable-ribonucleoside-enhanced cross-linking immunoprecipitation (PAR-CLIP) analysis.

Components

Preswollen gel, ready-to-use, 2 ml or 5 ml gel (settled gel volume) in buffer that contains 20% ethanol as a preservative, nonsterile.
Protein A content: 3 mg/ml pre-swollen gel

Quality

Purity: >98% (HPLC, SDS-PAGE); entirely free from staphylococcal enterotoxins.

Other Notes

For life science research only. Not for use in diagnostic procedures.

Safety Information

• Pictograms: GHS02,GHS07
• Signal Word: Warning
• Hazard Statements: H226 - H319
• Precautionary Statements: P210 - P280 - P303 + P361 + P353 - P337 + P313 - P370 + P378 - P403 + P235
• Hazard Classifications: Eye Irrit. 2 - Flam. Liq. 3
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 1
• Flash Point(F): 102.2 °F
• Flash Point(C): 39 °C