title: Positively darwinian molecules?
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D005075:Biological Evolution; D011480:Protease Inhibitors / Q000235:genetics* / Q000378:metabolism; D011506:Proteins / Q000235:genetics* / Q000378:metabolism; D015842:Serine Proteinase Inhibitors; D015843:Serpins; D014359:Trypsin Inhibitor, Kazal Pancreatic / Q000235:genetics / Q000378:metabolism; D014361:Trypsin Inhibitors / Q000235:genetics / Q000378:metabolism
chemical_list: D011480:Protease Inhibitors; D011506:Proteins; D015842:Serine Proteinase Inhibitors; D015843:Serpins; D014361:Trypsin Inhibitors; C039345:ovomucoid inhibitors; D014359:Trypsin Inhibitor, Kazal Pancreatic; C033691:contrapsin