for his work on ribonucleaseandfor their contribution to the understanding of the connection between chemical structure and catalytic activity of the ribonuclease molecule
for their elucidation of the enzymatic mechanism underlying the synthesis of adenosine triphosphateandfor his discovery of an ion-transporting enzyme, Na+, K+ -ATPase
... don't call themselves quacks, they can change their name to whatever is trendy at the time, e.g. herbalist. They also promote the distrust of conventional medicine, ...