The plasmid pPIC9K and the yeast cell strain GS115 were obtained from the Key Laboratory of Molecular Medicine of Fudan University [15 (link)]. The E. coli strain DH5α was obtained from TIANGEN Biotech Co., Ltd. (Beijing).
Yeast nitrogen base (with or without amino acids) was purchased from Sigma. Q-Sepharose-FF and Sephadex G-50 were purchased from GE Healthcare.
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