6.3.3.1 - 1308, 1310 6.3.3.1 bifunctional enzyme with AIR synthetase activity and phosphoribosyl-glycinamide synthetase activity 1313, 1316 6.3.3.1 copurification of AIR synthetase, glycinamide ribonucleotide synthetase, and glycinamide ribonucleotide transformylase 1310 6.3.3.1 purification of a histidine-tagged enzyme by nickel-affinity column chromatography 651681 6.3.3.1 purification of a histidine-tagged recombinant enzyme by affinity chromatography 653485 6.3.3.1 purification of wild type and recombinant enzymes using C8-linked ATP affinity column 649909 6.3.3.1 trifunctional enzyme with AIR synthetase activity, phosphoribosylglycinamide synthetase activity, and phosphoribosylglycinamide transformylase activity 1309, 1312 6.3.3.1 using a recombinant histidine-tagged AIRS:cyanogen bromide Sepharose affinity resin 653535