TABLE 1.

DNA sequences of oligonucleotides used for ChIP and RT-PCR

Loci	Sense primer (5'–3')	Antisense primer (5'–3')	Product size (bp)
ChIP primers
Hoxa1 rare	TCTTGCTGTGACTGTGAAGTCG	GAGCTCAGATAAACTGCTGGGACT	268
Hoxa1 pp	ATTGGCTGGTAGAGTCACGTG	GAAAGTTGTAATCCCATGGTCAGA	276
CYP26 R1 rare	CCCGATCCGCAATTAAAGATGA	CTTTATAAGGCCGCCCAGGTTAC	87
CYP26 R2 rare	TTCACTGAGATGTCACGGTCC	TTCCCAATCCTTTAGCCTGA	64
RARβ2 rare	TGGCATTGTTTGCACGCTGA	CCCCCCTTTGGCAAAGAATAGA	284
−18kb Hoxb1 3'	ACTCCAGCTCCCATTTCCCACTT	CTGCCTGCCTCTGCCTCACA	411
Osteopontin	GTATTCCAGTCTCACAAACTGCTTG	CATACTGTGTTCCAGGTCAGTTGG	336
RT-PCR primers
Hoxa1 a	TGGAGGAAGTGAGAAAGTTGGC	ATGGGAGTCGAGAGGTTTCC	484
b	TTCCCACTCGAGTTGTGGTCCAAGC		147
CYP26	GAAACATTGCAGATGGTGCTTCAG	CGGCTGAAGGCCTGCATAATCAC	272
RAR β 2	GATCCTGGATTTCTACACCG	CACTGACGCCATAGTGGTA	247
36B4	AGAACAACCCAGCTCTGGAGAAA	ACACCCTCCAGAAAGCGAGAGT	448
Osteopontin	TGACGAATCTCACCATTCGGATGA	TTTCCAGACTTGGTTCATCCAGCT	338

^aPrimer used in semi-quantitative PCR analysis

^bPrimer used in real time RT-PCR analysis