https://www.cgrpinhibitor.com/2016/10/20/subsequently-we-succeeded-in-purifying-recombinant-atraaox2-by-making-use-of-66his-tag-program-in-the-c-terminal-conclude-the-recombinant-protein-was-analyzed-by-sds-page-and-mttbased-gel-stain-zym/