Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Njem: Na Nitrosomonas europaea, enzyme ammonia monooxygenase (AMO) na-ebute ụzọ mbụ nke oxidation (amonia na hydroxylamine).  Ajụjụ: Gịnị na-eme akụkụ mbụ nke oxidation?
enzyme ammonia monooxygenase