Necrostatin-34 (Nec-34), a RIPK1 kinase inhibitor, stabilizes RIPK1 kinase in an inactive conformation by occupying a distinct binding pocket in the kinase domain. In Vitro Necrostatin-34 (Nec-34) exhibits IC 50 values of 667 nM and 134 nM for TNFα in FADD def-Jurkat cells and L939 cells, respectively. Necrostatin-34 (Nec-34, 10 μM) inhibits the dimerization-induced RIPK1 activation as examined by phosphorylation of Ser166 (p-S166) of RIPK1, a biomarker for RIPK1 activation. Necrostatin-34 (Nec-34) may block TNFα-induced complex II formation by inhibiting the activation of RIPK1 kinase. MCE has not independently confirmed the accuracy of these methods. They are for reference only. Western Blot AnalysisCell Line: RIPK1 knockout L929 cells transfected with an expressing vector encoding an inducible and dimerizable RIPK1 fused with FKBP at the C-terminus. Concentration: 10 μM. Incubation Time: 30 min (and then 100 ng/mL TNFα was added for indicated periods of time). Result: Downregulated p-S166 levels. Form:Solid