CRYPTOXANTHIN 



175 



Detection and estimation: After separation from other phytoxanthins by 

 chromatographic analysis, rubixanthin can be identified by its spectral prop- 

 erties. 



Physiological properties: Rubixanthin exhibits no vitamin A activity. 



3. CRYPTOXANTHIN C40H56O 



History 



1932 Yamamoto and Tin^ isolate a phytoxanthin from Carica papaya and 

 propose the name caricaxanthin. The formula C4oH5g02 is assigned to the 

 new pigment. 



1933 KuHN and Grundmann^ discover a new polyene pigment in the red 

 berries of Physalis Alkekengi and Physalis Franchetii. They term the 

 new pigment cryptoxanthin, determine the correct molecular formula, 

 and derive a constitution formula. 



1933 Karrer and Schlientz^ establish the identity of caricaxanthin and 

 cryptoxanthin, and correct the formula given by Yamamoto and Tin. 



Source 

 Arbutus Unedo 

 Blood serum of cattle 



Butter 



Capsicum annuum 

 Carica- papaya 

 Celastrus scandens L. 

 Citrus poonensis (fruit) 



Cucurhita Pepo 



Diospyros costata (fruit) 

 Egg yolk 



Grevillae robusta, 

 Cunningham 



Helianthus annuus 

 References p. 214— 2iy. 



TABLE 38 



OCCURRENCE OF CRYPTOXANTHIN 



References 

 K. ScHON, Biochem. J. 2g (1935) 1779, 1782. 

 A. E. GiLLAM and M. S. El Ridi, Biochem. /. 29 ( 1 935) 

 2465. 



A. E. Gillam and I. M. Heilbron, Biochem. J. 2g 

 (1935) 834. 

 L. Zechmeister and L. v. Cholnoky, Ann. ^og 



(1934) 269. 



R. Yamamoto and S. Tin, L. Set. Pap. Inst. phys. 



chem. Res. 20 (1933) 411. — Chem. Centr. igjj, I. 3090. 



A. L. Le Rosen and L. Zechmeister, Arch, of Biochem. 



J (1943) 17. 



R. Yamamoto and S. Tin, L. Sci. Pap. Inst. phys. 



chem. Res. 21 (1933) 422/425. — Chem. Centr. 1934, I, 



1660. 



L. Zechmeister, T. BeRes and E. Ujhelyi, Ber. 68 



(1935) 1322. 



K. Schon, Biochem. J. 2g (1935) 1779, 1782. 



A. E. Gillam and I. M. Heilbron, Biochem. J. 2g 



(1935) 1064. 



L. Zechmeister and A. PolgAr, /. biol. Chem. 140 



(1941) 1. 



L. Zechmeister and P. Tuzson, Ber. 67 (1934) 170. 



