title: Imaging biochemical systems in vivo.
mesh_terms: D000630:Aminopterin / Q000031:analogs & derivatives / Q000378:metabolism; D000818:Animals; D001665:Binding Sites; D001693:Biological Transport, Active; D004791:Enzyme Inhibitors / Q000378:metabolism; D006801:Humans; D007457:Iodine Radioisotopes; D011485:Protein Binding; D011877:Radionuclide Imaging; D013961:Thyroid Gland / Q000000981:diagnostic imaging / Q000378:metabolism
chemical_list: D004791:Enzyme Inhibitors; D007457:Iodine Radioisotopes; D000630:Aminopterin