3.4.24.1 - 3.4.24.1 affinity purified 3.4.24.1 HT-1, HT-2 and HT-3 3.4.24.1 native enzyme from venom by anion exchange chromatography and gel filtration 3.4.24.1 native enzyme from venom by anion exchange chromatography, dialysis, ultrafiltration, and gel filtration