title: Variations on a theme.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001692:Biological Transport; D007328:Insulin / Q000378:metabolism*; D046911:Macromolecular Substances; D011972:Receptor, Insulin / Q000378:metabolism*; D013329:Structure-Activity Relationship
chemical_list: D007328:Insulin; D046911:Macromolecular Substances; D011972:Receptor, Insulin