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Indeed, the hint of a mechanism can be found in Behe. Obviously, the cascade must have a start, so how does it start?

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Indeed, the hint of a mechanism can be found in Behe. Obviously, the cascade must have a start, so how does it start?

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… it seems there is always a trace of thrombin in the bloodstream. Blood clotting is therefore auto-catalytic, because proteins in the cascade accelerate the production of more of the same proteins. Starting pathway. X<> has been omitted from diagram. This is hypothesized to be either spontaneous or catalyzed by X*. (Both cases are known to exist). A stimulus triggers the conversion of X to X*, and X* autocatalytically drives this conversion also. X* then acts on a target.

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