CHLOROPHYLLS C AND d, BACTERIO- AND PROTOCHLOROPHYLL 615 



c 

 o 

 u 



Egregia 

 Extract 



Extract 

 minus a 



I I I I 



580 610 

 (A) 



0.1 



:i 



J ' 1 1 



I I I I I I I I ' T 



580 610 

 WAVE LENGTH, m/i 



400 500 600 



WAVE LENGTH, m/i 

 (C) 



400 500 600 700 



WAVE LENGTH, m^ 

 ID) 



I I I I 



I I I I 



I I I I 



400 500 600 



WAVE LENGTH, m/i 



700 



660 670 680 690 



WAVE LENGTH, m/i 



700 



Fig. 21.5. Spectrum of chlorophyll c (chlorofucin) in methanol. Absorption coeffi- 

 cients, a, in relative units (after Strain and Manning 1942). (A) Chlorofucin from 

 Egregia, a brown alga (spectrum calculated by difference). (5) Same spectrum measured 

 with chlorofucin prepared by adsorption (dots) or partition (solid line). (C) Chlorofucin 

 from Nitzschia, a diatom (measured spectrum). {D, E, F) Absorption spectra of chloro- 

 phylls a, d, d', and of isochlorophylls d and d'; absorption coefficients, a, in relative 

 units (after Manning and Strain 1943). Open circles in E, absorption coefficients of 

 isochlorophyll d. 



