The activities of a number of enzymes seen in adults and in animal material were found in the anlage of the developing eye in relatively early stages. Using standardized methods according to Lojda, activities of the following enzymes were proved in cryostat sections of the 9 and 10-week eye: ALP, ACP, ATP, TPP, alpha-GPDH and G6PDH. In 19-week eye moreover, positive reaction for DPP IV, ANE, CHE, ACHE was also detected, while G6PDH activity disappeared. In neither of the age categories SDH activity could be seen.

Department of Histology and Embryology Medical Faculty of the Palacký University Olomouc Czechoslovakia