FIG. 4.
Chk2 phosphorylates the SCD in vitro. In vitro kinase assays were performed on soluble GST-Chk2 and mutants in the presence of the substrate GST-HA-SCD or GST-HA-SCD(7A) and [γ−32P]ATP. The top panel shows [γ-32P]ATP incorporation into GST-HA-SCD or GST-HA-SCD(7A). GST-HA-SCD or GST-HA-SCD(7A) (middle panel). GST-Chk2 and its mutants (bottom panel) were detected by immunoblotting with anti-GST. IB, immunoblotting.