<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A role used to specify the physical structure type of a protein molecule (e.g. metalloprotein, transmembrane protein). Both the domain and range for this role are 'Gene Product'.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>
nci:P98
The role was originally intended for protein structure tagging (e.g., Phosphoprotein, Lipoprotein). Was extended to also tag for Membrane Protein, Protein Complex Subunit, etc.