FIG 1.
Construction, expression, and purification of ZIKV NS5, NS5pol, and NS5mut. (A) Schematic diagram of the NS5, NS5pol, and NS5mut expression vectors. NS5mut contains an active-site mutation (GDD → GAA) in amino acids 663 to 665. MTase, methyltransferase domain. (B) SDS-PAGE analysis of protein expression and purification. Lanes T, total cell lysate; lanes S, soluble fraction; lanes E, eluate from the HisPur Ni-NTA agarose resin; lane M, protein standard marker. The sizes of protein markers (in kilodaltons) are indicated on the right.