Figure 1From: The origin of bmp16, a novel Bmp2/4relative, retained in teleost fish genomesPossible phylogenetic positions of bmp16 relative to those of Bmp2 and Bmp4. Because of the highly divergent nature of bmp16 sequences, it is not clear whether this gene was generated by the teleost-specific genome duplication (A), the two-round genome duplications early in vertebrate evolution (B), or a gene duplication event in an earlier evolutionary period (C).Back to article page