From Pap to ApUp.
D000255:Adenosine Triphosphate / Q000502:physiology; D002621:Chemistry; D004167:Diphtheria Toxin / Q000266:history*; D049673:History, 20th Century; D009243:NAD / Q000502:physiology; D014481:United States
D004167:Diphtheria Toxin; D009243:NAD; D000255:Adenosine Triphosphate