During oogenesis, Hel25EGFP is mainly nuclear but is also present in substantial quantities in the cytoplasm. During early embryogenesis, it is localized with DNA. At preblastoderm stages, it is associated with the fusome during metaphase. At the syncytial blastoderm stage, Hel25EGFP is nuclear with an accumulation at the basal pole of the nuclei at the same location as euchromatin.