A convenient set consisting of five phosphoinositide 3-kinase (PI 3-kinase) inhibitors. The five inhibitors are: 1 mg of IC87114 (Cat. No. 1661-1), 5 mg of LY-294002 (Cat. No. 1667-5), 1 mg of PI-103 (Cat. No. 1728-1), 1 mg of PI3-Kγ inhibitor AS-605240, and 1 mg of TGX-221 (Cat. No. 1781-1).