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Y. Moustapha-abba-moussa, . Thomas, . Crbm, F. ). Montpellier, V. Bäcker et al., Travo (RIO Imaging facility at the CRBM) and U. Rothbauer (ChromoTek GmbH, Martinsried, Germany) for technical assistance, and C) for technical assistance and helping us interpreting ultrastructural data. We are grateful to M, Cazevieille (CRIC

. Sardet, . Igmm, F. Montpellier, . For, and . Discussions, The authors want to thank the following researchers for providing essential reagents: C. Dehay (Institute of Brain and Stem Cell Research, INSERM, Bron, France) for proving us with Rhesus sperm samples, ) for his generous gift of the polyG and polyE antibodies, and Y. Ishimi (Mitsubishi-Kasei Institute of Life Sciences