Western blot analysis of SARS-CoV-2 ORF7a polyclonal antibody (1:500) and Goat Anti-Rabbit IgG (H&L) secondary antibody (HRP) (1:20000), Lane 1: 293F cell lysate (negative control), Lane 2: 293F cell transfection pcDNA3.0-ORF7a-His. Western blot analysis of His-tag polyclonal antibody (1:500) and Goat Anti-Rabbit IgG (H&L) secondary antibody (HRP) (1:20000), Lane 3: 293F cell lysate, Lane 4: 293F cell transfection pcDNA3.0-ORF7a-His.