1x96-well filter plate, x-Plex assay format that includes premixed coupled beads, detection antibodies, and lysates for detecting phosphorylated c-Jun (Ser63), ERK2 (Thr185/Tyr187), JNK (Thr183/Tyr185), p38 MAPK (Thr180/Tyr182), p53 (Ser15), requires phosphoprotein reagent and cell lysis kit offered separately