LFM-A13 is a selective inhibitor of Brutons tyrosine kinase (BTK) - IC50s = 2.5 µM (recombinant BTK) and 17.2 µM (human BTK).1,2 It has also been shown to inhibit Polo-ilke kinase (PLK) - IC50 = 61 µM for human PLK3.3 It displayed no activity (concentrations up to 278 µM) at JAK1, JAK3, HCK, EGFRK and IRK2 or CDK1-3, CHK1, IKK, MAPK1, SAPK2a and ten tyrosine kinases3.
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