<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A role used to assert a relationship between a specific allele (product; enzyme) and drug-metabolizing efficacy. The domain and range for this role are 'Gene' and 'Drug, Food, Chemical or Biomedical Material', respectively.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>