CHL-770 FROM GREEN BACTERIA 



429 



rather poor fit of the data to any monotonic function of concentration, it 

 appears that the sedimentation coefficient at infinite dilution and 20 °C 

 is about 7 Svedberg units. 



The molecular weight was determined by the method of equilibrium 

 sedimentation in the Spinco Model E equipped with Rayleigh inter- 

 ference optics (10) and a special double- channel cell developed by 

 Yphantis (11), in which each channel is divided into three separate 

 compartments (~2,5 mm column height). The three compartments of 

 one channel were filled with three concentrations of the protein- 

 chlorophyll complex, and the compartments of the other channel were 



LjJ 



< 



Q. 

 O 



6.04 



6.06 



6.08 6.10 

 RADIUS (cm) 



6.12 



6.14 



Fig. 7. Logarithm of fringe displacement versus distance from center 

 of rotation from left hand interference pattern in Fig. 6. The data shown 

 are taken from the "bottom" 1 mm portion of the ~2.5 mm column. 



