Changes in the pattern of histone H1 phosphorylation during Drosophila hydei embryogenesis

Histone H1 phosphorylation was examined during embryonic development of Drosophila hydei. A changing pattern of H1 phosphorylation upon separation on an acid-urea polyacrylamide gel was observed in the course of Drosophila embryogenesis. It is considered to be related to the decrease of the mitotic activity of the cells as development proceeds.