Effect of enforced expression of a catalytically inactive mutant of CDK8 on the homotypic cell adhesion of BMC cells. Morphological properties of BMC-mock, BMC-k8^AMG, and BMC-k8^WT are shown. Expression of CDK8 was detected by anti-CDK8 antibody (inset panels). Upper and lower bands indicate Myc-tagged exogenous CDK8 and endogenous CDK8.