...none of the cascade proteins are used for anything except controlling the formation of a clot. Yet in the absence of any of the components, blood does not clot, and the system fails. <ref>Behe, M. 1996. Darwin's Black Box, p.86. New York: The Free Press</ref> | ...none of the cascade proteins are used for anything except controlling the formation of a clot. Yet in the absence of any of the components, blood does not clot, and the system fails. <ref>Behe, M. 1996. Darwin's Black Box, p.86. New York: The Free Press</ref> |