

10 



Fig. 10. Relatively thick section of a small sulfur purple bacterium, Thiocapsa, 

 grown at low light intensity. The cytoplasm contains typical membrane-bounded 

 vesicles (v), as well as a large inclusion of paired lamellae (L). The very 

 electron-dense areas represent polymetaphosphate deposits. The clear areas 

 are probably deposits of glycogen. Main fixation, 18 hours, post staining with 

 lead hydroxide. X 120,000. 



