<prompt> Abzyme is aan:IsoenzymeAbnormal enzymeAntibody with a catalytic activityAllosteric enzyme  <response>: Abzyme is antibody acting as enzyme. It is a monoclonal antibody and is also called catalytic antibody or Catmab. Isozymes Option 1: Physically distinct form of enzyme which catalyses same biochemical reaction. If species are different then isoenzymes are called alloenzymes. Allosteric enzymes Option 4 or regulatory enzymes, unlike simple enzymes have regulatoryallosteric site other than the active site, where the regulator activatorinhibitor binds. 