Abstract
The activities of glucose-6-phosphate dehydrogenase and of 6-phos-pho-gluconate dehydrogenase have been determined in cows, heifers, bulls and calves. The material consisted of 80 RDM, 46 SDM, 31 Jersey animals older than 3 months, 16 newborn RDM calves and 29 fetuses of various breeds.