Mother Nature likes some halogenated compounds.
D000900:Anti-Bacterial Agents / Q000378:metabolism; D006846:Hydrocarbons, Halogenated / Q000378:metabolism*; D010544:Peroxidases / Q000378:metabolism; D013974:Thyroxine / Q000378:metabolism
D000900:Anti-Bacterial Agents; D006846:Hydrocarbons, Halogenated; D010544:Peroxidases; D013974:Thyroxine