1x96-well filter plate, x-Plex assay format that includes premixed coupled beads, detection antibodies, and lysates for detecting phosphorylated ATF-2 (Thr71), NF-kappaB p65 (Ser536), p53 (Ser46), STAT3 (Ser727), STAT6 (Tyr641), requires phosphoprotein reagent and cell lysis kit offered separately