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27. Newton, J. W., and Kamen, M. D., unpublished observations. 



28. Olsen, J., and Chance, B., private communication. 



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36. Vernon, L. P., Arch. Biochem. and Biophys., 43, 492 (1953). 



37. Vernon, L. P., and Kamen, M. D., Arch. Biochem. and Biophys., 41, 122 



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38. Vernon, L. P., and Kamen, M. D., /. Biol. Chem., 211, 643 (1954). 



39. Warburg, O., Naturwiss., 42, 449 (1955). 



40. Wessels, J. S. C, Rec trav. chim., 73, 529 (1954). 



41. Wolken, J. J., and Schwertz, F. A., /. Gen. Physiol., 37, 111 (1953). 



