CHLOROPLAST STRUCTURE 463 



or that there is energy transfer between units, which is in contradiction to the 

 concept of a unit. 



Granick : If chlorophyll molecules are oriented parallel to each other in units or 

 packets and then these units are in turn oriented at random with respect to each 

 other, one might get a small polarization of fluorescence, but not 40%. 



References 



1. Granick, S., Handh. d. Pfltinzenphysiologie, vol. 1, p. 511. Springer- Verlag, 1955. 



2. Steinmann, E., and Sjostrand, F. S., Exptl. Cell. Research, 8, 15 (1955). 



3. Wolken, J. J., and Palade, G. E., Ann. N. Y. Acad. Set., 56, 873 (1953). 



4. Palade, G. E., J. Exptl. Med., 95, 285 (1952). 



5. Von Wettstein, D., unpublished. 



6. Goedheer, J. C., Biochim. et Biophys. Acta, 16, 471 (1955). 



7. Menke, W., and Menke, G., Z. Naturforsch., 10b, 416 (1955). 



8. Arnold, W., and Meek, E. S., Arch. Biochem. and Biophys., 60, 82-90 (1956). 



9. Arnold, W., and ()]>penheimer, J. R., ,/. Gen. Physiol., 33, 423 (1949). 



