Visual excitation and blood clotting.
Both processes involve extremely large amplification between the stimulus and the response. In vision it had been suggested that thismight be achieved by a chain of successive proenzyme-enzyme activations. Such a chain has now been found to underlie the mechanism of blood clotting. Methods are suggested for pursuing this comparison further.
D001777:Blood Coagulation; D002384:Catalysis; D004792:Enzyme Precursors; D006801:Humans; D010786:Photoreceptor Cells / Q000502:physiology*; D012168:Retinal Pigments
D004792:Enzyme Precursors; D012168:Retinal Pigments