where is phenylalanine hydroxylase found in the body
Phenylalanine hydroxylase In humans, this enzyme is expressed both in the liver and the kidney, and there is some indication that it may be differentially regulated in these tissues.[25] PAH is unusual among the aromatic amino acid hydroxylases for its involvement in catabolism; tyrosine and tryptophan hydroxylases, on the other hand, are primarily expressed in the central nervous system and catalyze rate-limiting steps in neurotransmitter/hormone biosynthesis.[13]
Small intestine Absorption of the majority of nutrients takes place in the jejunum, with the following notable exceptions:
Euphrates The Euphrates (/
Swallowing 5) Closure of the nasopharynx
Vein Veins are less muscular than arteries and are often closer to the skin. There are valves in most veins to prevent backflow.
Small intestine Food from the stomach is allowed into the duodenum through the pylorus by a muscle called the pyloric sphincter.