The present invention relates to antibodies and fragments thereof,
polynucleotide and polypeptide molecules for zFGF5 a novel member of the
FGF family. The polypeptides, and polynucleotides encoding them, are
proliferative for muscle cells, in particular cardiac cells and may be
used for remodeling cardiac tissue and improving cardiac function. The
present invention also includes antibodies to the zFGF5 polypeptides.