ESTIMATION 



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51. J. W. Huff, W. A. Perlzweig and M. Tilden, Fed. Proc, 1945, 



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54. H. Isbell, /. Biol. Chem., 1942, 144, 567. 



55. E. C. Barton-Wright, Biochem. J., 1944, 38, 314. 



56. /. Assoc. Off. Agric. Chem., 1947, 30, 44, 82, 398 ; Cf. E. Kodicek 



and C. R. Pepper, /. Gen. Microbiol., 1948, 2, 292. 



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58. P. Fildes, Brit. J. Exp. Path., 1938, 29, 239. 



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60. H. Grossowicz and E. Sherstinsky, /. Biol. Chem., 1947, 167, loi. 



61. A. Dorfman, S. A. Koser, M. Horwitt, S. Berkman and F. Saunders, 



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 231 



