[Corticosteroid hormones in the blood and adrenals of the aurochs Bison bonasus].

Using thin-layer chromatography, studies have been made on corticosteroids in the aurochs Bison bonasus. Hydrocortison, corticosteron, aldosteron, 11-dehydrocorticosteron and 11-deoxycorticosteron were found in the suprarenals. Besides these hormones, the blood of the aurochs contains cortison, 17-oxy-11-deoxycorticosteron ("S" compounds) and unidentified fraction. Compounds revealed in the blood of the aurochs were also found in the bison and ox. The ratio of hydrocortison to corticosteron together with 11-dehydro- and 11-deoxycorticosteron is equal to 0.42 +/- 0.06 in the suprarenals and to 0.34 +/- 0.01 in the blood.