Double behaviour of o-diphenol:O2 oxydoreductase from apricot

Abstract

By extracting o-diphenol: ()2 exydoreductase from apricot with low or high pH buffers two different forms of the enzyme are obtained, as judged by their curves activity-pH. The enzyme extracted at low pH can be irreversiblely converted into the high pH one by standing and the conversion is accelerated in the pressence of large amounts of urea, which points to some kind of dissociation.