Figure 6.
JNK activity and c-Jun status in Jnk1 − /− cells. (a) Thymocytes and (b) lymph node cells from wild-type and Jnk1 − /− mice were stimulated for the indicated times with 10 μg/ml anti-CD3 plus 0.1 μg/ml anti-CD28 antibodies, and JNK activity was determined in whole cell extracts, using solid-state kinase assay and GST–c-Jun (1-79) as a substrate. The same extracts were analyzed for their content of phospho-c-Jun (S63), total c-Jun, and actin by Western blot analysis.