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Mech Dev. 1999 Sep;87(1-2):207-12.

APH-1, a POU homeobox gene expressed in the salt gland of the crustacean Artemia franciscana.

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  • 1University of Liège, Laboratoire de Biologie Moléculaire et de Génie Génétique, Tilman, Belgium.


We characterized the first POU-homeoprotein in a crustacean (designated APH-1 for Artemia POU-Homeoprotein, EMBL Y15070). The amino acid sequence of the APH-1 POU-domain is identical, except for two residues, to that of the two class III POU proteins Cf1-a (Drosophila) and POU-M1 (Bombyx mori). Southern blot analysis suggests that crustaceans have only one class III POU gene. RT-PCR and whole-mount in situ hybridization show that APH-1 mRNA is present in larvae specifically in the salt gland, an organ which is involved in osmoregulation, and disappears in the adult.

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