The interconversion of purine nucleotides during Ilyanassa embryogenesis

The phosphorylation and interconversion of purines was measured after pulsing normal and lobeless Ilyanassa embryos with [2-³H]-adenosine. The isolated polar lobe phosphorylated and interconverted purines to the same extent as the intact egg, and the removal of this anucleate structure did not significantly impair these functions in the lobeless egg. All components of the egg, i.e. the polar lobe and lobeless egg, were equally effective in the synthesis of dATP.