is 206.93 KB, has a resolution of 1200x681 pixels and was uploaded on February 14, 2019 @ 4:12 pm by user: patriohm. It is filed under the tags: phenylalanine, tyrosine hydroxylase, dopamine, tyrosine, levodopa. Click the blue button at the top to freely download: Biological Tyrosine Levodopa Dopamine Norepinephrine Phenylalanine png.