500 



Joseph S. Kahn 



borohydride could be detected in the extract, 



300 



400 SOO 600 



WAVELENGTH, m^^ 



700 



Figure II. Absorption spectra of protein-chlorophyll 

 extracted with 25% diethyl ether in petroleum ether, (A) 

 and of the extract dissolved in water (B) . 



Table III 



Absorption maxima of the yellow pigment extracted from 

 protein-chlorophyll, dissolved in various solvents. 



Solvent 



Wavelength, mp 



water 



petroleum ether 

 chloroform 

 carbon disulfide 



426 451 481 

 416 435 468 



427 449 480 

 442 468 500 



