Sophie Bel-Vialar, Nobue Itasaki, Robb Krumlauf. Initiating Hox gene expression: in the early chick neural tube differential sensitivity to FGF and RA signaling subdivides the HoxB genes in two distinct groups. Development 2002 Nov;129(22):5103-15.
Authors indicated the probe was a gift from K. Olberg. As insufficient information is provided in publication to verify exact sequence used to synthesize probe, the sequence above was obtained from NCBI (accession number NM_204911.2).