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Molecular Biology and Evolution, Vol 16, 634-645, Copyright © 1999 by Society for Molecular Biology and Evolution

ORIGINAL ARTICLE

Molecular characterization and phylogenetic analysis of SpBMP5-7, a new member of the TGF-beta superfamily expressed in sea urchin embryos

MR Ponce, JL Micol, KJ Peterson and EH Davidson
Division de Genetica, Universidad Miguel Hernandez, Alicante, Spain.

TGF-beta ligands are probably pan-bilaterian in phylogenetic distribution. The family appears to have diversified greatly with the evolution of the vertebrates, but only a few invertebrate deuterostome TGF-beta molecules have so far been isolated. A search for members of this family expressed in sea urchin embryos, using canonical PCR primers, revealed a single-copy gene encoding a new TGF-beta protein. The sequence which it encodes is closely related to those of vertebrate bone morphogenetic proteins (BMPs) 5-7. No additional TGF-beta family members were uncovered other than univin, which had previously been reported.
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