1.14.13.160 - 717711 1.14.13.160 native enzyme 84fold to homogeneity by ammonium sulfate fractionation, anion exchange chromatography, gel filtration, again ammonium sulfate fractionation, and affinity chromatography 717711 1.14.13.160 recombinant enzyme 717141 1.14.13.160 recombinant protein 717126