Class II ribonuclease (RNase) (By similarity). Binds to several cytokinins including natural adenine-type (e.g. trans-zeatin and kinetin) and artificial urea-type (e.g. N,N'-diphenylurea and N-phenyl-N'-(2-chloro-4-pyridyl)urea) hormones (PubMed:18406424, PubMed:19220853, PubMed:29630775). Interacts with melatonin (PubMed:29630775). Causes an allergic reaction in human. Belongs to the BetVI family.