Source: E. coli
Formulation: Preservative and carrier-free in 0.3M NaCl, 1X PBS, pH 7.4. Filtered through 0.22μm filter.
Concentration: xx based on OD 280nm. Extinction Coefficient = 1.8.
Purification: Purified from E. coli by multi-step chromatography.
(1) SARS-CoV-2 NCR has a C-terminal 7xHis-tag.
(2) Point mutation (P46G) introduced to increase stability.