196 



MACROMOLECULAR COMPLEXES 



Fig. 9. An electron micrograph of a thin section of organisms which had 

 been lyophilized and extracted in boiling solvents before fixation. The organ- 

 isms were distorted by this procedure, but the bulk of the electron-dense material 

 is still observed despite the absence of lipids. The metaphosphote inclusions 

 (M) also persist. X 80,000. 



saturation represents a ratio of about one osmium atom for ever\- 

 eight amino acid residues. 



The total uptake of osmium by the Ivophihzed chromatophores 

 produced a 30 per cent increase in weight. This is essentially a 

 summation of the uptake expected for the sum of the two fractions; 

 however, the course of the reaction was not a simple summation of 

 concomitant reactions by the protein and the lipid. In 1 hour the 

 chromatophores had increased in weight by 15 per cent, or half of 



