Western blot analysis of extracts from various cell lines using IGF-I Receptor α (D3A2W) Rabbit mAb.
Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.
For western blots, incubate membrane with diluted primary antibody in 5% w/v BSA, 1X TBS, 0.1% Tween® 20 at 4°C with gentle shaking, overnight.
NOTE: Please refer to primary antibody datasheet or product webpage for recommended antibody dilution.
From sample preparation to detection, the reagents you need for your Western Blot are now in one convenient kit: #12957 Western Blotting Application Solutions Kit
NOTE: Prepare solutions with reverse osmosis deionized (RODI) or equivalent grade water.
Load 20 µl onto SDS-PAGE gel (10 cm x 10 cm).
NOTE: Volumes are for 10 cm x 10 cm (100 cm2) of membrane; for different sized membranes, adjust volumes accordingly.
* Avoid repeated exposure to skin.
posted June 2005
revised November 2013
Reprobing of an existing membrane is a convenient means to immunoblot for multiple proteins independently when only a limited amount of sample is available. It should be noted that for the best possible results a fresh blot is always recommended. Reprobing can be a valuable method but with each reprobing of a blot there is potential for increased background signal. Additionally, it is recommended that you verify the removal of the first antibody complex prior to reprobing so that signal attributed to binding of the new antibody is not leftover signal from the first immunoblotting experiment. This can be done by re-exposing the blot to ECL reagents and making sure there is no signal prior to adding the next primary antibody.
NOTE: Prepare solutions with reverse osmosis deionized (RODI) or equivalently purified water.
posted June 2005
revised October 2016
Protocol Id: 10
IGF-I Receptor α (D3A2W) Rabbit mAb recognizes endogenous levels of total IGF-I receptor protein. The epitope resides within the alpha subunit of the IGF-I receptor protein.Species Reactivity:
Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Glu563 of the human IGF-I receptor protein. The peptide region lies within the alpha subunit of the IGF-I receptor.
The type 1 insulin-like growth factor receptor (IGF1R) is a transmembrane receptor tyrosine kinase that is widely expressed in many cell types in fetal and postnatal tissues, and which is highly similar in sequence and structure to the insulin receptor (1-4). IGF1R is synthesized as a preproprotein which is proteolytically cleaved into alpha and beta subunits. Receptor assembly involves heterodimerization of two alpha and two beta subunits to generate the heterotetrameric transmembrane receptor. The alpha subunits form the extracellular ligand binding domain; ligand binding by IGF-I or IGF-II initiates autophosphorylation of conserved intracellular residues in the beta subunit kinase domain, leading to kinase activation and subsequent activation of downstream signal transduction pathways (e.g., Akt and MAPK) (4-8). Enhanced mitogenic signaling through the IGF1R is frequently observed in cancer, making the IGF1R an important research target in translational oncology (9).
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