RIPA buffer, and Bicinchoninic acid assay kit (Thermo Fisher Scientific, Inc.) were used to extract and quantify the total protein from cells. 8 ~ 12% SDS-PAGE separated the proteins for 60 min and transferred onto PVDF membranes (EMD Millipore). The membranes were blocked with 3% BSA for 1 h at room temperature, and then incubated at 4 °C for 8 h with primary antibodies. It was followed by IRDye800 conjugated secondary antibody for 1 h at 37 °C. Immunoreactive protein was detected with an Odyssey Scanning System (LI-COR Inc., Lincoln, Nebraska).
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