The p38 MAPK phospho-regulation kit can be used for immunocytochemical co-localization of p38 MAPK phosphorylation at Thr-180/Tyr-182 and Tyr-323 relative to the total expression of p38 MAPK. The kit includes rabbit polyclonal and mouse monoclonal antibodies along with Goat-anti-Rabbit conjugated to DyLight® 594 and Goat anti-Mouse conjugated to DyLight® 488 for dual labeling experiments.