Fig. 9. Me(3)K20H4 distribution on Drosophila polytene chromosomes. A polytene chromosome spread stained with DAPI (A) and anti-Me(3)K20H4 (B). (C) Merged image of A and B. Me(3)K20H4 has a punctate appearance and is concentrated at the chromocenter (arrow) and at numerous euchromatic bands.