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P3391

Millipore

Protein A-Sepharose™ from Staphylococcus aureus

lyophilized powder

Synonym(s):

Protein A–Agarose

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About This Item

MDL number:
MFCD00165563
UNSPSC Code:
41106500
NACRES:
NA.56

form

lyophilized powder

packaging

glass bottle of 1 g
glass bottle of 1.5 g
glass bottle of 250 mg
glass bottle of 5 g

storage condition

do not freeze

extent of labeling

3 mg per mL

technique(s)

affinity chromatography: suitable

color

white to gray

matrix

Sepharose CL-4B

matrix activation

cyanogen bromide

matrix attachment

amino

matrix spacer

1 atom

capacity

≥16 mg/mL binding capacity (human IgG)

solubility

water: 1 g/L at 20 °C

suitability

conforms to structure for swelling capacity (1g swells to 4 to 5 mL)

storage temp.

2-8°C

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General description

Protein A-Sepharose when linked with antibody, helps improving antigen binding capacity of IgG crosslinked to column matrices. In this case, binding happens between Protein A and Fc portion of the IgG molecule leaving antigen specific sites free.

Application

Protein A-Sepharose was used:
  • for immunoprecipitated placentas for protein and RNA analyses using Western blot technique.
  • in chromatin immunoprecipitation to understand the link between Mediator and remodelling of chromatin structure at specific promoters.
  • as lysis buffer to remove endogenous G-type Igs in protein extraction of brain samples from female rats.
  • in immunoprecipitation of [32P] phosphomyristin C of rabbit antiserum, to study the down-regulation of protein kinase C (PKC) and phosphomyristin C (PMC) during T-cell development.
Protein A-Sepharose™ is used for affinity chromatography, antibody purification and characterization, immunoaffinity matrices, protein chromatography, protein A, G and L resins, and recombinant protein expression and analysis. Protein A-Sepharose™ has been used to develop strategies for investigating protein interactions, to improve the detection of celiac disease, and to study diabetes in children.

Quantity

Swelling: 1 g swells to approx. 4 ml.

Physical form

Supplied as lyophilized powder stabilized with lactose and dextran.

Legal Information

Sepharose is a trademark of Cytiva

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

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Protocols

Immunoprecipitation Procedure

To determine the molecular weights of protein antigens, to study protein/protein interactions, to determine specific enzymatic activity, to monitor protein post-translational modifications and to determine the presence and quantity of proteins.

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