The δ1-Catenin phospho-regulation kit can be used for immunocytochemical labeling of phosphorylation at Tyr-228, Tyr-280, and Tyr-302 in δ1-Catenin. The kit includes a monoclonal antibody to examine the pattern of expression of the total population of δ1-Catenin. In addition, secondary reagents conjugated to DyLight® 488 or DyLight® 594 are included for labeling primary antibodies for detection using green (493Ex/518Em) or red (593Ex/618Em) filter sets.