Nk-2 homeobox transcription factor

A polynucleotide selected from one of the groups consisting of:

• (a) a polynucleotide comprising a polynucleotide sequence having at least 95% identity to the polynucleotide sequence of SEQ ID NO:
• 1 or SEQ ID NO:
• 3;
• (b) a polynucleotide having at least 95% identity to the polynucleotide of SEQ ID NO:
• 1 or SEQ ID NO:
• 3;
• (c) a polynucleotide comprising a polynucleotide sequence encoding a polypeptide sequence having at least 95% identity to the polypeptide sequence of SEQ ID NO:
• 2 or SEQ ID NO:
• 4;
• (d) a polynucleotide having a polynucleotide sequence encoding a polypeptide sequence having at least 95% identity to the polypeptide sequence of SEQ ID NO::
• 2 or SEQ ID NO:
• 4;
• (e) a polynucleotide with a nucleotide sequence of at least 100 nucleotides obtained by screening a library under stringent hybridization conditions with a labeled probe having the sequence of SEQ ID NO:
• 1 or SEQ ID NO:
• 3 or a fragment thereof having at least 15 nucleotides;
• (f) a polynucleotide which is the RNA equivalent of a polynucleotide of (a) to (e);
• or a polynucleotide sequence complementary to said polynucleotide
• and polynucleotides that are variants and fragments of the above mentioned polynucleotides or that are complementary to above mentioned polynucleotides, over the entire length thereof.