Complex sentence: For its preparation a snake farm, very skilled and well trained staff and a special laboratory is required, which explains both the limited quantities available and the extremly high price of ancrod, as of course the ultrapurified enzyme is needed for clinical use.
Split into simpler sentences: For its preparation a snake farm, very skilled and well trained staff and a special laboratory is required. This explains the high price of ancrod, as of course the ultrapurified enzyme is needed for clinical use.