Description_x000D_ Packaging_x000D_ 5, 25 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ Pelitinib (EKB-569) is an orally active, potent, second generation irreversible epidermal growth factor receptor tyrosine kinase (EGFR TK) inhibitor. Pelitinib is selective for EGFR (ErbB-1) with an IC50 about 80 nM, but also covalently binds to ErbB-2 (HER2/c-neu) and ErbB-4 (Her 4) with much lower potency. Pelitinib has been shown to inhibit the growth of EGFR-overexpressing tumor cell lines._x000D_ Other Notes_x000D_ Light sensitive_x000D_ This compound was developed by Pfizer for Kinase Phosphatase Biology research. To learn more about Sigma′s partnership with Pfizer and view other authentic, high-quality Pfizer compounds, visit sigma.com/bsm-pfizer._x000D_ To browse the list of other pharma-developed compounds and Approved Drugs/Drug Candidates, click here._x000D_ Legal Information_x000D_ Sold for research purposes under agreement from Pfizer Inc._x000D_ Pfizer is a registered trademark of Pfizer, Inc.