112 MACROMOLECULAR COMPLEXES 



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DISCUSSION 

 A. Hodge, ]. ]. Wolken, A. C. Giese 



Dr. Hodge (Massachusetts Institute of Technology): Would you please 

 indicate the conditions under which the chloroplastin rings form? 



Dr. Wolken: The simplest procedure is to place a drop of chloroplastin 

 on a clean microscope slide, warm gently, and then quickly transfer the slide 

 to the microscope. 



Dr. Giese (Stanford University): Is there any suggestion of the deriva- 

 tion of chloroplasts from cilia, as there is in the case of rods and cones? 



Dr. Wolken: I do not think that the chloroplasts are derived from the 

 cilia. However, it is quite likely that the chloroplast lamellae are formed from 

 fibrillar protein macromolecules. 



