{"0": "Transporter", "1": "SLC superfamily of solute carriers", "2": "SLC25 family of mitochondrial transporters", "3": "Mitochondrial nucleotide transporter subfamily", "4": "Receptor", "5": "Metalloprotease", "6": "Oxidase", "7": "Calcium-binding protein", "8": "Reductase", "9": "SNARE protein", "10": "Oxidoreductase", "11": "Membrane trafficking regulatory protein", "12": "Protease", "13": "Serine protease", "14": "Heterotrimeric G-protein", "15": "Non-protein kinase", "16": "RNA helicase", "17": "G-protein"}