1.1.1.118 - 285778 1.1.1.118 affinity chromatographys 763638 1.1.1.118 His-tag GDH variants 701045 1.1.1.118 SP-Sephadex C-50 gel filtration, phenyl-Sepharose column chromatography, and Affi-Gel Blue matrix gel filtration 639110