Universal Magnetic Co-IP Kit
magnetic beads for low background co-immunoprecipitation
The Universal Magnetic Co-IP Kit improves co-immunoprecipitation (Co-IP) through the use of protein G-coated magnetic beads, which speed and simplify the procedure while greatly reducing background. The kit includes optimized reagents for making both nuclear & whole-cell extracts from cells or tissue, giving you the flexibility to Co-IP any protein complex, whether it was originally bound to DNA or in the cytoplasm.
Universal Magnetic Co-IP Kit advantages
- Perform Co-IP of nuclear or cytoplasmic protein complexes, beginning from cells or tissue
- Magnetic beads speed and simplify the procedure while reducing background, enabling the use of low-stringency buffers that maintain complex integrity
- Nuclear extraction procedure removes nuclear protein complexes from the DNA without disrupting protein/protein interactions
- Inhibitor solutions included to preserve the integrity of protein modifications
Perform Co-IP of cytoplasmic & nuclear protein complexes
While Co-IP is often used to study cytoplasmic protein complexes, traditional methods are not optimal for studying DNA-binding proteins because these nuclear complexes are fragile and can be difficult to remove from the DNA. This causes them to either be disrupted during extraction, or to be lost because they remain bound to the DNA. For this reason, in addition to containing components for whole-cell extraction, the Universal Magnetic Co-IP Kit provides nuclear extraction reagents that have been optimized to preserve nuclear protein complexes. The reduced background provided by the low non-specific binding of the kit's magnetic beads makes it possible to use a low-stringency Co-IP/Wash Buffer that helps maintain the protein complexes (Figure 1). To further improve Co-IP of nuclear complexes, the kit’s proprietary Enzymatic Shearing Cocktail uses DNA digestion to release undissociated protein complexes from the DNA. Even histone complexes, which are not released from the DNA by traditional high-salt extraction methods, can be studied (Figure 2).
Figure 1: Co-Immunoprecipitation of a nuclear complex containing SRC-1 and ERα.
Figure 2: Detection of acetylated Histone H3.
Contents & Storage
Each Universal Magnetic Co-IP Kit provides sufficient reagents to make 25 nuclear and 25 whole-cell extractions, and then to perform 25 co-immunoprecipitations. Kits include PBS, Hypotonic Buffer, Whole-cell Lysis Buffer, Co-IP/Wash Buffer, Phosphatase Inhibitors, Protease Inhibitor Cocktail, Deacetylase Inhibitor, PMSF, EDTA, Digestion Buffer, Enzymatic Shearing Cocktail, Detergent, Protein G Magnetic Beads and a Bar Magnet for making a magnetic stand. The reagent storage conditions vary from room temperature to -20°C. Please download a manual for complete kit specifications and storage conditions. All reagents are guaranteed stable for 6 months when stored properly.