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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Psx, a novel murine homeobox gene expressed in placenta.

To identify homeobox genes involved in mouse embryo development, we have screened a mouse cDNA library prepared from the 13.5-day-old entire conceptus for homeobox-containing sequences using a polymerase chain reaction (PCR) cloning strategy. We identified a mouse homeobox gene that might be the prototype of a new class. The full-length cDNA, designated Psx (placenta specific-homeobox), encodes a protein of 247 amino acids. The expression patterns of the Psx during embryonic development and in adult tissues were studied by Northern blot analysis. The Psx transcript was first detected at embryonic day 8.5 of conceptus and persisted until birth. Psx mRNA is expressed in extraembryonic tissues, mainly in placenta, but not in fetus, pups and adult tissues tested, suggesting that Psx plays an important role in placenta. Psx is a new member of the murine homeobox genes which are expressed in extraembryonic tissues such as placenta and amnion.[1]


  1. Psx, a novel murine homeobox gene expressed in placenta. Han, Y.J., Park, A.R., Sung, D.Y., Chun, J.Y. Gene (1998) [Pubmed]
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