TABLE 1.

Enzymes used for riboprobe labeling.

Antisense Probe	Restriction enzyme for anti-sense probe	RNA polymerase for RNA transcription	References
Hoxa2	EcoRI	T7	Nonchev et al., 1996
Hoxb2	BamHI	T3	This study
Hoxb3	BamHI	T3	Wilkinson et al., 1989
Jag1	EcoRI	T3	Jones et al., 2000