TPH1 Wikipedia
Tryptophan hydroxylase 1 TPH1 is an isoenzyme of tryptophan hydroxylase which in humans is encoded by the TPH1 TPH1 was first discovered to synthesize serotonin in 1988 and was thought that there only was a single TPH gene until 2022 while a second form was found in the mouse Tph2 rat and human brain and the original TPH was then renamed to TPH1