A convenient set consisting of seven inhibitors useful for the study of MAP Kinase signaling pathway. The seven inhibitors are: 1 mg of PD 184352 (Cat. No. 1585-1), 5 mg of PD 98059 (Cat. No. 1666-5), 1 mg of SB 203580 (Cat. No. 1712-1), 25 mg of Sorafenib (Cat. No. 1594-25), 5 mg of SP 600125 (Cat. No. 1669-5), 5 mg of U0126 (Cat. No. 1668-5), and 1 mg of ZM 336372 (Cat. No. 1789-1).