The cDNA sequence of human NAMPT was amplified by PCR from a pGex-6p-three-hNAMPT plasmid (kindly gifted from Dr Shui-qing YE, College of Missouri). The PCR products and solutions were being digested and cloned right into a pET21a+ vector working with NdeI and XhoI restriction enzymes. Some extent mutation was launched by the quick change website-d