PROBLEMS OF A MUSCLE DISEASE 



(17) Shank, R. E., and Hoagland, G. L., unpublished data. 



(18) du Vigneaud, V., Chandler, J. P., Cohn, M., and Brown, G. B., J. Biol. 

 Chem., 134, 787 (1940). 



(19) du Vigneaud, V., Gohn, M., Ghandler, J. P., Schenck, J. R., and Sim- 

 monds, S., J. Biol. Chem,, 140, 625 (1941). 



425 



