<prompt> Answer this question truthfullyWhich enzyme is considered the rate-limiting enzyme of the process of fatty acid β-oxidation?  <response>: <reason> The enzyme Carnitine palmitoyl transferase-1 CPT-1 is the rate-limiting enzyme of fatty acid β-oxidation.Fatty acid β-oxidation is a metabolic pathway that involves the breakdown of fatty acids into acetyl-CoA, which can then be used as an energy source by the body. This pathway is important for maintaining energy homeostasis in the body, particularly during periods of fasting or low-carbohydrate intake.The first step in fatty acid β-oxidation is the transport of fatty acids from the cytosol into the mitochondria, where they can be broken down by the β-oxidation pathway. This transport is facilitated by the enzyme carnitine palmitoyl transferase-1 CPT-1, which is located on the outer mitochondrial membrane.CPT-1 catalyzes the transfer of the fatty acid from coenzyme A to carnitine, which allows the fatty acid to cross the mitochondrial membrane and enter the mitochondrial matrix. This step is considered to be the rate-limiting step of fatty acid β-oxidation, as it controls the entry of fatty acids into the pathway.Deficiencies in CPT-1 can lead to a variety of health problems, including fatty acid oxidation disorders, which are a group of rare genetic disorders that affect the breakdown of fatty acids for energy production. 