This UCP1 protein allows the protons ( H + ) of the mitochondrial intermembrane space to enter the mitochondrial matrix without going through the ATP synthase. This bypass represents a shortcut for protons and uncouples (i.e. eliminates the interrelationship between) the following two processes: - The entry of protons inside the mitochondrial matrix, following their concentration gradient. - The phosphorylation of ADP into ATP by the ATP synthase. It is this uncoupling that gave the protein its name: uncoupling protein 1 (UCP1). The following figure shows the location of UCP1 when it is expressed (synthesized) in the brown adipose tissues (BAT) of hibernating mammals. 3ased on the UCP1 protein structure shown earlier, and based on the figure above, what type frotein is CP 1 . a) A coenzyme b) A secondary active transporter c) A motor protein d) A primary active transporter e) A passive transporter.