Gyi Addendum 



) 



/ 111 



Halobacterium sp. 



A mutant of Staphijlococcus aureus unable to produce 

 bright pigments incorporated the label of 2-c^*-mevalonic 

 acid into phytoene, which it accumulated.*''" 



The biosynthesis and function of the carotenoid pig- 

 ments have been reviewed.*-' Also a review of cis, trans- 

 isomeric carotenoid pigments has been published.'^'' 



6. Polyenes and Polyynes, Excluding Polyene Macrolides 



In a review of polyacetylenes"^^ a number of substances 

 not included in our list were mentioned without refer- 

 ences or physical properties. These are reproduced here: 



193a Octa-2,6-dien-4-yn-l,8-dioic Acid, C8H6O4. 



HOOC— CH=CH— C = C— CH=CH— COOH 



Polyporus anthracophilus 



194a Non-2-en-4,6,8-triynoic Acid, CgH402. 



HC=C— C=C— C=C— C=C— CH=CH— COOH 



Psilocybe sarcocephala 

 195a Non-2-frans-oxido-4,6,8-triynol (Biformin?), CgHgOo. 



HC=C— C=C— C^C— CH— CH -CH2OH 



trans 



Coprinus quadrifidis {Polyporus biformis?) 



*®° Ginzaburo Suzue, Biochim. et Biophys. Acta 45 616 (1960). 

 «T. W. Goodwin, Advances in Enzymol. 21 295-361 (1959). 

 ^" L. Zechmeister, Fortschr. Chem. org. Naturstoffe 18 (1960). 

 51 E. R. H. Jones, Proc. Chem. Soc, 199-211 (1960). 



