CaMKII phosphorylates a GST-fusion protein expressing the N-terminus of EAAT1. Representative image of [γ-32P] incorporation (top) and Coomassie gel (below) of GST-fusion EAAT1, EAAT2 and GluR1 proteins phosphorylated by purified δCaMKII. Lanes contain 1: GST only, 2: GST EAAT1 N-terminus, 3: GST EAAT1 C-terminus, 4: GST EAAT2 N-terminus, 5: GST EAAT2 C-terminus, 6 and 7: GST GluR1.