obsolete cytochrome P450 dependent 16beta-hydroxy-beta-amyrin epoxidase activity (obsolete GO:0102602)
OBSOLETE. Catalysis of the reaction: 16beta-hydroxy-beta-amyrin + O2 + H+ + NAD(P)H = 12,13beta-epoxy-16beta-hydroxy-beta-amyrin + H2O + NAD(P).