https://w3id.org/framester/conceptnet5/data/en/protein_molecule <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/protein> <https://w3id.org/framester/conceptnet5/data/en/peptide> <https://w3id.org/framester/conceptnet5/data/en/heteropolymer> <https://w3id.org/framester/conceptnet5/data/en/biopolymer> risorse dalla linked data cloud