The thyroid gland in fish mainly secretes the thyroid prohormone 3,5,3',5'-tetraiodothyronine (T₄), and extrathyroidal outer ring deiodination (ORD) of the prohormone to 3,5,3'-triiodothyronine (T₃) is pivotal in thyroid hormone economy. Despite its importance in thyroid hormone metabolism, factors that regulate ORD are still largely unresolved in fish. In addition, the osmoregulatory role of T...

During meiosis, sister chromatid cohesion is required for normal levels of homologous recombination, although how cohesion regulates exchange is not understood. Null mutations in orientation disruptor (ord) ablate arm and centromeric cohesion during Drosophila meiosis and severely reduce homologous crossovers in mutant oocytes. We show that ORD protein localizes along oocyte chromosomes during ...