Anti-phospho-Insulin-Like Growth Factor-1 Receptor/Insulin Receptor (Tyr1135, Tyr1136/Tyr1150, Tyr11

Type I insulin-like growth factor receptor IGF-IR), a transmembrane tyrosine kinase, is widely expressed among many cell types in fetal and postnatal tissues, as well as many cell lines (1-3). Upon binding of its ligands, IGF-I and IGF-II, autophosphorylation of receptors occurs. The triple tyrosine cluster (Tyr1131, Tyr1135 and Tyr1136) within the kinase domain is the earliest major site of autophosphorylation (4). Phosphorylation of these three tyrosine residues is necessary for kinase activation (5,6). Insulin receptors (IRs) share significant similarity with IGF-I receptors in both structure and function. There is also an equivalent triple tyrosine cluster (Tyr1146, Tyr1150 and Tyr1151) in the activation loop of the kinase domain. Tyrosine autophosphorylation of the receptors is one of the earliest cellular responses to insulin stimulation (7). The autophosphorylation begins by phosphorylation of Tyr1146 and either Tyr1150 or Tyr1151. The full activation of receptor kinase activity depends on the triple tyrosine phosphorylation (8). Applications: Suitable for use in Western Blot. Other applications not tested. Recommended Dilution: Western Blot: 1:1000, Optimal dilutions to be determined by the researcher. Storage and Stability: May be stored at 4°C for short-term only. For long-term storage and to avoid repeated freezing and thawing, aliquot. Store at -20°C. Aliquots are stable for at least 12 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.