758 



SUMMARY 



lipid constituents (Benson), 



Sophisticated methods of electron microscopy and small 

 angle x-ray diffraction have been applied to a study of 

 lamellar structure which must be responsible for the intri- 

 cate transfer of quanta and charges to and within conversion 

 centers (Menke). 



In the lon^^ run the intimate details of the transformation 

 of light energy must yield to an attack in which chloroplasts 

 are broken down into their constituent parts and then recon- 

 stituted. The beginnings of this approach are seen in the 

 reports of chlorophyll-protein complexes (Takamiya) particu- 

 late sub-units of the chloroplasts (Allen, Kahn), and even 

 colloidal pigment suspensions (San Pietro, Vernon) retaining 

 photochemical activity. 



