METABOLISM OF CAROTENOIDS A\D VITAMINS A 



543 



Table 4 {Continued) 



" H. J. Deuel, Jr., E. Sumner, C. Johnston, A. Polgdr, and L. Zeichmeister, Arch. 

 Biochem., 6, 157-161 (1945). 



'' H. J. Deuel, Jr., C. Johnston, E. R. Meserve, A. Polgdr, and L. Zechmeister, Arch. 

 Biochem., 7, 247-255 (1945). 



<= H. J. Deuel, Jr., C. Johnston, E. Sumner, A. Polgdr, and L. Zechmeister, Arch. 

 Biochem., 5, 107-114 (1944). 



-* L. Zechmeister, H. J. Deuel, Jr., H. H. InhoiTen, J. Leemann, S. AI. Greenberg, and 

 J. Ganguly, Arch. Biochem. Biophys., 36, 80-88 (1952). 



" H. J. Deuel, Jr., C. Johnston, E. Sumner, A. Polgdr, W. A. Schroeder, and L. Zech- 

 meister, Arch. Biochem., 5, 365-371 (1944). 



! H. J. Deuel, Jr., C. Hendrick, E. Straub, A. Sandoval, J. H. Pinckard, and L. Zech- 

 meister, Arch. Biochem., 14, 97-103 (1947). 



" L. Zechmeister, J. H. Pinckard, S. M. Greenberg, E. Straub, T. Fukiii, and H. J. 

 Deuel, Jr., Arch. Biochem., 23, 242-245 (1949). 



* S. M. Greenberg, C. E. Calbert, J. H. Pinckard, H. J. Deuel, Jr., and L. Zechmeister, 

 Arch. Biochem., 34, 31-39 (1949). 



' H. J. Deuel, Jr., E. R. Meserve, C. H. Johnston, A. Polgdr, and L. Zechmeister, 

 Arch. Biochem., 7, 447-450 (1945). 



' H. J. Deuel, Jr., S. M. Greenberg, E. Straub, T. Fukui, A. Chatterjee, and L. Zech- 

 meister, Arch. Biochem., 23, 239-241 (1949). 



* H. J. Deuel, Jr., E. R. Meserve, A. Sandoval, and L. Zechmeister, Arch. Biochem., 10, 

 491-496 (1946). 



' H. J. Deuel, Jr., H. H. Inhoffen, J. Ganguly, L. Wallcave, and L. Zechmeister, Arch. 

 Biochem. Biophijs., 40, 352-357 (1952). 



the Si\\-irans compound prepared from the monkey-flower (Mimulus longi- 

 florus Grant) or from the berries of the narrow-leaf firethorn (Pyracantha 

 angusfifoUa Schneid.), but is identical with that of the all-/ran.s isomer pre- 

 pared from pro-7-carotene by iodine catalysis, as well as with that of the 

 sample prepared from tomato paste. It is just possible that the first two 

 samples of the all-trans compound described above, which have the low bio- 

 logic activity, differ chemically from the all-^rans form prepared syntheti- 

 cally. On the basis of the storage of vitamin A in the liver of vitamin A- 



