Visual Excitation and Blood Clotting

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Science  19 Nov 1965:
Vol. 150, Issue 3699, pp. 1028-1030
DOI: 10.1126/science.150.3699.1028


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.