Fig 1: Purification of nucleocapsid protein from remnant SUMO-tag post ULP-1 cleavage. A A Coomassie-stained gel visualizing the nucleocapsid protein after 30 kDa filter unit-based purification (purity > 70%). B A western blot image that shows the recognition of the expressed, cleaved and purified SARS-CoV-2 nucleocapsid protein by a human anti-SARS-CoV-2 nucleocapsid mAb (ab273168, Abcam). M marker (PagerRulerTM Plus), CN cleaved and purified nucleocapsid, BSA bovine serum albumin