Src kinase inhibitor I is a 4-anilinoquinazole competitive inhibitor of Src family tryosine kinases. Src kinase inhibitor I is a dual site inhibitor, described to compete at both the ATP and peptide binding sites of the kinase.Src Inhibitor-1 may be used in Src kinase-mediated cell signaling studies. Src kinase inhibitor I is a 4-anilinoquinazole competitive inhibitor of Src family tryosine kinases. Src kinase inhibitor I is a dual site inhibitor, described to compete at both the ATP and peptide binding sites of the kinase. Src Inhibitor-1 may be used in Src kinase-mediated cell signaling studies.