Hsp90AA1 sgRNA sequences and the siHsp90α and siHsp90β sequences were synthesized by iGeneBio (Guangzhou, China). The transfection of CRISPR-Cas9 plasmids for Hsp90α knockout, siHsp90α and siHsp90β were carried out with LIPO3000 (L3000015, Life Technologies, USA). According to the protocol, after 48 h, cells were collected, and incubated in the selection medium containing 800 μg/mL G418 (G001, MDBio, Inc, China) for 2–3 weeks. The successfully Hsp90AA1 knockout clones were confirmed by western blotting (21 (link)).