lOI 



Carotenes and Carotenoids 



174 Lutein (Xanthophyll, Luteol), C40H56O2, yellow prisms, m.p. 

 190°, [alcd'" +165° (c 0.7 in benzene), U.V. 420, 446.5, 

 476 m^u, in petroleum ether. 



Mycobacterium phlei, Staphylococcus aureus, Sarcina 

 hitea, Micrococcus lysodeikticus 



Erwin Chargaff, Compt. rend. 197 946 (1933). 



Mary A. Ingraham and Harry Steenbock, Biochem. J. 29 

 2553 (1935). 



Tatsuo Ohta, J. Pharm. Soc. Japan 71 1319 (1951). (Isola- 

 tion) 



A. R. Gilby and A. V. Few, Nature 182 55 (1958). 



175 Neurosporene (6,7,6',7'-Tetrahydrolycopene), C40H60, yellow-or- 

 ange or yellow-brown crystals, m.p. 124°, U.V. 414, 438.5, 

 469 rrifj. in petroleum ether. 



Neurospora crassa, Rhodotorula rubra, etc. 



Neurosporene and hydroxylated neurosporenes are 

 probable intermediates in the biogenesis of other carote- 

 noids occurring in microorganisms. 



J. Bonner, A. Sandoval, W. Tang and L. Zechmeister, Arch. 

 Biochem. 10 113 (1946). 



Francis Haxo, ibid. 20 400 (1949). 



L. Zechmeister and B. Kenneth Koe, /. Am. Chem. Soc. 76 

 2923 (1954). 



Synnove Liaaen Jensen, Germaine Cohen-Bazire, T. O. M. 

 Nakayama and R. Y. Stanler, Biochim. et Biophys. Acta 29 477 

 (1958). 



