80 



THE BACTERIAL PHOTOCHEMICAL APPARATUS 



700 800 900 1,000 

 mjj 



0.6 



700 800 900 1,000 

 mjj 



0.6 



700 800 900 1,000 

 mjj 



700 800 900 1,000 

 m/j 



Fig. 6. Diagramatic representation of various far-red presentations of the 

 spectrum of bacteriochlorophyll associated with the photochemical apparatus 

 in a variety of bacteria. The 800 m^ peak is always present and the variation 

 occurs in the region from 800-900 m/i. The simplest spectrum, with a single 

 peak at 800 m/z, occurs in a pigmented lipoprotein from CJilorobiiiDi (14). The 

 divergent spectra in Chro»ialin»i D arc dependent on nutritional conditions and 

 light intensity during growth, which may well affect the photochemical struc- 

 tures (see text). 



