Kayunta Johnson-Winters, Ph.D.

2006 University of Wisconsin-Milwaukee, Milwaukee, WI 
"Kayunta Johnson-Winters"
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Graham R. Moran grad student 2006 UW-Milwaukee
 (Structural and kinetic characterization of 4-hydroxyphenylpyruvate dioxygenase from Streptomyces avermitilis.)
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Joseph E, Le CQ, Nguyen TQ, et al. (2016) Evidence of negative cooperativity and half-site reactivity within an F420-dependent enzyme: A kinetic analysis of F420H2:NADP+ oxidoreductase. Biochemistry
Le CQ, Joseph E, Nguyen T, et al. (2015) Optimization of Expression and Purification of Recombinant Archeoglobus fulgidus F420H2:NADP(+) Oxidoreductase, an F420 Cofactor Dependent Enzyme. The Protein Journal
Hossain MS, Le CQ, Joseph E, et al. (2015) Convenient synthesis of deazaflavin cofactor FO and its activity in F(420)-dependent NADP reductase. Organic & Biomolecular Chemistry. 13: 5082-5
Davis AC, Johnson-Winters K, Arnold AR, et al. (2014) Kinetic results for mutations of conserved residues H304 and R309 of human sulfite oxidase point to mechanistic complexities. Metallomics : Integrated Biometal Science. 6: 1664-70
Johnson-Winters K, Davis AC, Arnold AR, et al. (2013) Probing the role of a conserved salt bridge in the intramolecular electron transfer kinetics of human sulfite oxidase. Journal of Biological Inorganic Chemistry : Jbic : a Publication of the Society of Biological Inorganic Chemistry. 18: 645-53
Osumah T, Le CQ, Nguyen TD, et al. (2013) The biochemistry of F420 cofactor biosynthesis Recent Trends in Gene Expression. 47-73
Astashkin AV, Rajapakshe A, Cornelison MJ, et al. (2012) Determination of the distance between the Mo(V) and Fe(III) heme centers of wild type human sulfite oxidase by pulsed EPR spectroscopy. The Journal of Physical Chemistry. B. 116: 1942-50
Klein EL, Raitsimring AM, Astashkin AV, et al. (2012) Identity of the exchangeable sulfur-containing ligand at the Mo(V) center of R160Q human sulfite oxidase. Inorganic Chemistry. 51: 1408-18
Johnson-Winters K, Nordstrom AR, Davis AC, et al. (2010) Effects of large-scale amino acid substitution in the polypeptide tether connecting the heme and molybdenum domains on catalysis in human sulfite oxidase. Metallomics : Integrated Biometal Science. 2: 766-70
Johnson-Winters K, Tollin G, Enemark JH. (2010) Elucidating the catalytic mechanism of sulfite oxidizing enzymes using structural, spectroscopic, and kinetic analyses. Biochemistry. 49: 7242-54
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