Protein A

Protein A is a 42 kDa surface protein originally found in the cell wall of the bacterium Staphylococcus aureus. The protein is composed of five homologous Ig-binding domains that fold into a three-helix bundle. Each domain can bind proteins from many mammalian species, most notably IgGs (immunoglobulins). Protein A has the remarkable ability to bind to the Fc region of most immunoglobulins. It binds the heavy chain within the Fc region of most immunoglobulins and also within the Fab region in the case of the human VH3 family. This product is for research use only.

Product Details
Species Reactivity	Bind to the Fc region of most immunoglobulins
Source	E. coli
Type	Recombinant Protein
Measurement	A275 of 0.1% solution: ~0.149
Isoelectric point (pI)	4.7-4.8
Conjugate	Unconjugated
Purity	>95%
Molecular Weight	~44,600 (Apparent MW by SDS-PAGE: 45,000)
Protein Concentration	1mg/ml
Formulation	Liquid
Storage Condition	4°Cfor short time, -20°C or -80°C for long time.
Storage Buffer	20 mM Sodium Borate, pH8.0