[d-Aminolevulinic acid dehydrase in germinating seeds of Pinus pinea]

The purification grade of d-aminolevulinic acid dehydrase, the specific enzyme activity, the Michaelis constant and the optimum pH are determined in extracts from embryos and endosperms of Pinus pinea seeds germinated at different stages of germination. On the other hand the influence of levulinic acid, sodium cyanide, sodium malonate, sodium arsenite and sodium azide on the activity of d-aminolevulinic acid dehydrase has also been studied.