1x96-well filter plate, x-Plex assay format that includes premixed coupled beads, detection antibodies, and lysates for detecting phosphorylated c-Jun (Ser63), ERK1/2 (Thr202/Tyr204, Thr185/Tyr187), JNK (Thr183/Tyr185), MEK1 (Ser217/Ser221), PDGF receptor-β (Tyr751), Src (Tyr416), requires phosphoprotein reagent and cell lysis kit offered separately