<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A role used to assert that a gene product is the target of a therapeutic agent. The role implies a direct interaction between the product and the therapeutic agent but it does not specify the type of association (e.g., involvement, interference, inhibition or cleavage). The domain and range for this role are 'Drug, Food, Chemical or Biomedical Material' and 'Gene Product', respectively.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>