Figure 1. Protein X can be SUMOylated in vitro GST-protein X-Myc was incubated with His-SUMO E1, His- SUMO E2 and His-SUMO1GG (His-SUMO1AA was used as a negative control) at 30°C for 3 h. After reaction, GST-protein X-Myc was purified with Glutathione beads and detected with anti-Myc and anti-SUMO1 antibodies. Arrows represent SUMOylated GST-protein X-Myc.
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