MLN2238(Ixazomib; MLN-2238)选择性高效抑制20S proteasome的糜蛋白酶样蛋白水解(β5)位点，其IC50值是3.4 nM，Ki值是0.93 nM。同时，MLN2238抑制胱天蛋白酶样(β1)和胰蛋白酶样(β2)蛋白水解位点，其IC50值分别是31 nM和3500 nM。

参考文献

[1]. Kupperman E, et al. Evaluation of the proteasome inhibitor MLN9708 in preclinical models of human cancer. Cancer Research, 2010, 70 (5): 1970-80.

[2]. Lee E C, et al. Antitumor activity of the investigational proteasome inhibitor MLN9708 in mouse models of B-cell and plasma cell malignancies.[J]. Clinical Cancer Research, 2011, 17(23):7313-7323.

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