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Forms of Vitamin A and of Carotenoids in Tissues, Blood Serum and Yolk of Eggs from Coturnix coturnix japonica Fed ß-Apo-Carotenals¹

Department of Biochemistry, Kansas State University, Manhattan, Kansas 66502

Studies were made of the distribution of retinyl esters, retinol, retinaldehyde, and carotenoids in tissues, blood serum and yolk of eggs from Coturnix coturnix japonica (Japanese quail) fed ß-apo-8'-, ß-apo-10'-, and ß-apo-12'-carotenals as the only sources of provitamin A activity. Irrespective of the carotenal fed, relative concentrations of retinyl ester, retinol and retinaldehyde in the liver were approximately 4:2:1, and in egg yolk, 3:6:1, respectively. Relative distributions of the three forms of vitamin A in serum, spleen and lung were in the same order as in eggs, and those in kidney were similar to those in liver. The carotenoid pigments found in liver and egg yolk were the carotenoic acids corresponding to the carotenal fed, except both ß-apo-10'- and ß-apo-12'-carotenoic acids were identified when ß-apo-10'-carotenal was fed.

KEY WORDS: • vitamin A • carotenoids • ß-apo-carotenals • carotenoic acids

¹ Contribution no. 76, Department of Biochemistry, Kansas Agricultural Experiment Station, Manhattan, Kansas 66502.

Manuscript received 11 January 1972.