The IP assay was performed using Pierce Classic Magnetic immunoprecipitation (IP)/Co-IP Kit (Thermo Fisher, USA) according to the manufacturer’s instruction. Firstly, the different antibodies were incubated with protein A/G magnetic beads. Then the cell lysates from GSCs were collected and incubated with antibody coupled beads. The beads interacting proteins were washed and denatured and the proteins were examined using western blotting.
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