Creative Biolabs provides scientists around the world in various forms with cDNA cloning products. Our plasmid products cover SARS-CoV, MERS-CoV, SARS-CoV-2, and other coronaviruses as well as different strains, including humans, mice, monkeys, and other species, with Myc, HA, FLAG, His and other tags. All gene products are verified by secondary full-length sequencing, which guarantees 100% sequence accuracy. The A260 / A280 ratio of all plasmids is 1.8 ~ 2.0, ensuring the purity of the plasmid.