PROTAA-RO

Protein A Agarose

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

• Synonym(s): agarose, protein a
• UNSPSC Code: 41116133
• NACRES: NA.54
• Form: suspension
• Assay: >98% (HPLC and SDS-PAGE)

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.

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[1] and for the immunoprecipitation or co-immunoprecipitation of proteins.[2][3][4] It has also been used for photoactivatable-ribonucleoside-enhanced cross-linking immunoprecipitation (PAR-CLIP) analysis.[5]

Biochem/physiol Actions

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.

Analysis Note

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

Other Notes

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

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

Safety Information

• pictograms: GHS02,GHS07
• signalword: Warning
• pcodes: P210 - P280 - P303 + P361 + P353 - P337 + P313 - P370 + P378 - P403 + P235
• Hazard Classifications: Eye Irrit. 2 - Flam. Liq. 3
• Storage Class: 3 - Flammable liquids
• wgk: WGK 1
• flash_point_f: 102.2 °F
• flash_point_c: 39 °C
• hcodes: H226,H319