94 



mmassmm 



i- ,. , -gigi?ig . . ■ 



MACROMOLECULAR COMPLEXES 

 . ♦ » . • •• . . • 



PROTEIN 



T 



~«5;^ h 



•1,^ 



. • • ..*. • • ^"^i/* • •, 



Fig. 6. (a) Schematic structural identification of the chloroplast layers. 

 (b) Electron micrograph of chloroplastin, not fixed and not shadowed, (c) Elec- 

 tron micrograph of the chloroplast of Euglena granulata. 



for the carotenoid molecules at the interstitial positions between 

 the chlorophyll molecules. If these spaces are occupied as shown, 

 there will be one carotenoid molecule for at least every three chloro- 

 phyll molecules in the network. This kind of close packing of the 

 chlorophyll and carotenoid molecules in the pigment monolayers 

 would also permit energetic interaction between them. Other 

 models slightly modified from the one presented here indicate that 



