Molecular basis for methylation-sensitive editing by Cas9
Cloning, protein expression and purification The DNA encoding ThermoCas9 with a C-terminal His6 tag was integrated into the pML-1B vector and expressed in the Escherichia coli NiCo21(DE3) strain. Cells were grown in Luria–Bertani (LB) medium with 0.2% d-(+)-glucose at 37 °C until optical density at 600 nm reached 0.8, at which point addition, isopropyl-β-d-thiogalactopyranoside was added to 0.5 mM…