Actin protein (human platelet non-muscle, >99% pure)

Product Uses Include

• Identification and characterization of non-muscle actin binding proteins
• In vitro actin polymerization studies
• Antibody standard for Western blot analysis
  
  

Material
Non-muscle actin has been purified from human platelets. Each unit of platelets used in the preparation of non-muscle actin has been found to be non-reactive by an FDA approved test for HBsAg, HBcAb, HIV-1/2 ab, HIV-1 RNA, HTLV I/II ab, HCV ab, HCV RNA, and syphilis. Each unit of platelets has been ALT tested with results less than an established cutoff. The isotype composition of non-muscle actin is 85% β-actin and 15% γ-actin. Non-muscle actin has an approximate molecular weight of 43 kDa. The product is provided as a lyophilized white powder. The lyophilized protein is stable for 6 months when stored desiccated to <10% humidity at 4°C. The protein should be reconstituted to 10 mg/ml with distilled water.  It will then be in the following buffer: 5 mM Tris-HCl pH 8.0, 0.2 mM CaCl₂, 0.2 mM ATP, 5% sucrose, and 1% dextran. 
 

Purity
Protein purity is determined by scanning densitometry of Coomassie Blue stained protein on a 12% polyacrylamide gel. APHL99 consists of >99% pure non-muscle actin while APHL95 is >95% pure. 

Biological Activity
The biological activity of muscle actinis determined by its ability to efficiently polymerize into filaments (F-actin) in vitro and separate from unpolymerized components in a spin down assay. Stringent quality control ensures that APHL99 produces >85% F-actin and APHL95 produces >75% F-actin in this assay.