4.1.99.13 - 693832, 703212, 716329 4.1.99.13 (6-4) photoproduct DNA photolyase activity is detected in Crotalus atrox fibroblast. Activity is considerably enhanced when a UV-damaged DNA affinity column is used for purification. However, the activity is unstable and it is lost during purification or upon storage at -20° or -70°C for 2-3 months 682264 4.1.99.13 by fractionation of crude cell extracts with Heparin agarose and UV DNA affinity column chromatography 682086 4.1.99.13 by using a glutathione sepharose column and a Hi Trap Q column. Concentrated fusion protein is cleaved with thrombin from bovine plasma by incubation overnight at 4°C. For chromophore determination, the eluate from the glutathione sepharose column is purified through a Q sepharose column, omitting gel filtration procedure, and concentrated by ultrafiltration 682048 4.1.99.13 by using a glutathione-sepharose column and UV-irradiated DNA affinity column, fusion protein is cleaved with thrombin 682154 4.1.99.13 by using affinity chromatography and UV-irradiated DNA attached beads 682855 4.1.99.13 by using glutathione-sepharose columns 679920, 680605 4.1.99.13 fusion protein is applied to amylose column. At this point the protein is above 90% pure. Further purification can be obtained by applying the eluted material to a 10 ml heparin-agarose column. Maltose-binding protein is removed by treatment with factor Xa protease 681765 4.1.99.13 fusion protein is purified through a 20-ml amylose column and through heparin-agarose column 680604 4.1.99.13 NF-1 is isolated from nuclear extracts prepared from HeLa cell culture using a heparin column, an anion exchange Fractogel EMD TMAE-650 (S) column and a FPLC MonoS HR5/5 column 682153 4.1.99.13 protein is isolated from whole cell extracts from Xenopus laevis, purified by using a sepharose column and a UV-damaged DNA affinity column 682264 4.1.99.13 purified to near homogeneity from Drosophila embryonic cells by using NH4SO4 precipitation, SP sepharose column, UV DNA affinity beads, heparin sepharose column and Mono S column 682049 4.1.99.13 recombinant GST-tagged enzyme from Escherichia coli by glutathione affinity chromatography, and recombinant His-tagged wild-type and mutant enzymes from Escherichia coli strain C41(DE3) by nickel affinity and heparin affinity chromatography 747287 4.1.99.13 recombinant His-tagged enzyme from Escherichia coli by nickel affinity chromatography and gel filtration under dim light conditions or in darkness 728696 4.1.99.13 recombinant His-tagged wild-type and mutant enzymes from Escherichia coli by nickel affinity and heparin affinity chromatography, followed by gel filtration 747746 4.1.99.13 recombinant His-tagged wild-type and mutant enzymes from Escherichia coli strain ER2566 by nickel affinity chromatography and gel filtration 747528 4.1.99.13 recombinant N-terminally His-tagged enzyme from Escherichia coli strain BL21(DE3) by metal affinity and heparin affinity chromatography 726991 4.1.99.13 recombinant wild-type and mutant enzymes from Escherichia coli 749067