original_query: What is the role of UCPs in the transfer of anions and protons in mammalian cells?
query: What is the role of UCPs in the transfer of anions and protons in mammalian cells?
answer: UCPs facilitate the transfer of anions from the inner to the outer mitochondrial membrane and the transfer of protons from the outer to the inner mitochondrial membrane, reducing the mitochondrial membrane potential in mammalian cells.