Note
A rapid, colorimetric, microassay for detection of agents which are known agonists/antagonists of protein kinase C (PKC) was developed, utilizing their effects on adherence of EL-4.IL-2 cells. Cells that were incubated with agents which are known inducers of PKC activation, phorbol 12-myristate 13-acetate (PMA), phorbol 12, 13-dibutyrate (PDBu), mezerein and indolactam V, readily adhered to wells of 96 well microtiter plates within 1 - 2 hours, whereas cells incubated with the negative PKC activator, 4α-phorbol 12-myristate 13-acetate (4α-PMA), which is structurally related to PMA (4β-PMA), did not adhere.