1770 



CHEMISTRY OF CHLOROPLAST PIGMENTS 



CHAP. 37b 



COOH-CH.-C 



.c=:n 



-'^■^ H 



Glycine + acetate 



I n steps 



Hypothetical pyrrole 



COOH 4 

 I 

 4 HOOC CH, 3 



I I 

 3 H.C CH, 2 



I ; I 



2 c-rC 1 (I) 



II rl- 



1 HCy C-COOH 



/ N 

 ' H 



71 steps 



Uroporphyrin type III 

 (hypothetical first tetrapyrrole) 



COOH 



I 

 CH, COOH 



CH2 a CH2 



I H I 



C r^; C, 



Bacteriochlorophyll 



CH. 



CH H Me 



Me<r / if ">CH=-CH, 



HC. Mg CH (VIII) 



Chlor 6 -e- 



V"' ioOCH, 



COOCooH,, 



Chlorophyll a 



t 



Mg vinyl pheoporphynn a^ phytyl ester (yiT\ 

 or protoclilorophyll 



i H C 



\ 



C "C-CHj-CHo-COOH 

 H ffiH (i (II) 



COOH-C-C. Ic; ic[ ^C-CH,-COOH 



I H I 



C T C 



C.Hi 



/ 



,C-N 



C 



I 

 COOH 



C 

 I 

 COOH 



4 ste|)S (?) 



Chlor f 



Coproporphyrin type III 

 CCOH 



CH (VI) 



C 

 CH2 \H 

 I C-C=0 



CH. I 



I COOCH, 



COOH 



Mg vinyl pheoporphyrin a^ 



4-5 *teps 



Mg protoporphyrin (V) 



H3C 



HjC 



CHo-CH,-COOH 



(III) 



CH=CHj 



.CH (IV) 

 HN — C 



n steps 



COOH 



COOH 



Phycoerythrin ) 

 Phycocyanin / 



Fig. 37B.4. Scheme of chlorophyll biosynthesis fafter Granick 1951). 



