[Histochemistry of glucosephosphate dehydrogenase and lactate dehydrogenase of the neural cells of chick embryo].

A high intensity of the reactions to lactate dehydrogenase and glucous-6-phosphate dehydrogenase was demonstrated histochemically in the neural anlage of the chick embryos after 15, 20, 24, 30, 44, 48 and 72 hours of incubation. At early stages of the development cranio-caudal gradient of enzymatic reactions was distinctly traced. A high intensity of the reactions was observed in certain cells of the neural groove in 24-hours' embryos and in the neural tube of 48-hours' embryos. These cells are supposed to develop into neuroblasts.