Probe:	Snrpb cDNA
Probe preparation:	Antisense labelled with digoxigenin RNA

Structure	Level	Pattern	Image	Note
TS15: limb mesenchyme	Strong			There is strong staining in the distal and proximal limb.
TS15: limb	Strong			There is strong staining in the anterior and posterior limb.
TS15: trunk somite	Strong
TS15: 1st branchial arch maxillary component	Strong			Staining is present in the maxillary process.
TS15: 1st branchial arch	Strong			Staining is present in the mandibular arch.
TS15: 2nd branchial arch	Strong			Staining is present in the hyoid arch.
TS15: eye	Strong
TS15: genitourinary system	Strong	Regionally restricted		Staining is present in the external genitalia.
TS15: olfactory placode	Strong
TS15: otic pit	Strong

Structure	Level	Pattern	Image	Note
TS17: apical ectodermal ridge	Moderate
TS17: limb mesenchyme	Strong			There is strong staining in the progress zone and the middle and proximal limb.
TS17: limb	Strong	Non-Uniform		Staining is strong in the posterior limb and moderate in the anterior limb.
TS17: trunk somite	Strong
TS17: 1st branchial arch maxillary component	Strong			Staining is present in the maxillary process.
TS17: 1st branchial arch	Strong			Staining is present in the mandibular arch.
TS17: 2nd branchial arch	Strong			Staining is present in the hyoid arch.

Structure	Level	Pattern	Image	Note
TS19: limb mesenchyme	Strong	Regionally restricted		Staining is present in the progress zone and middle limb.
TS19: limb	Strong	Non-Uniform		Staining is strong in the posterior-distal region and moderate in the antero-distal region of the limb.
TS19: liver	Moderate
TS19: maxillary process	Moderate
TS19: nasal pit	Moderate			Staining is present in the olfactory placode.
TS19: inner ear	Moderate			Staining is present in the otic pit.