. "Conceptual Entity"^^ . "Gene_Product_Has_Chemical_ClassificationPTNCI" . "Gene_Product_Has_Chemical_Classification"^^ . . "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'.NCI" . "Gene_Product_Has_Chemical_Classification"^^ . . "R44"^^ . "Has Chemical Classification"^^ . "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."^^ .