Probe:	M24
Probe preparation:	Antisense labelled with digoxigenin RNA

Structure	Level	Pattern	Image	Note
TS15: 1st branchial arch	Present		4A
TS15: 2nd branchial arch	Present		4A
TS15: forelimb bud	Present		4A
TS15: olfactory placode	Present		4A
TS15: trunk somite	Present		4A

Structure	Level	Pattern	Image	Note
TS17: 1st branchial arch	Present		4B
TS17: 2nd branchial arch	Present		4B
TS17: forelimb bud	Present		4B
TS17: hindlimb bud	Present		4B
TS17: nasal process	Present		4B

Structure	Level	Pattern	Image	Note
TS17: 1st branchial arch	Present		4C
TS17: 2nd branchial arch	Present		4C
TS17: embryo mesenchyme	Present	Regionally restricted	4C	Expression detected in mesenchymal tissues of craniofacial structures such as the branchial arches.
TS17: forelimb bud ectoderm	Absent		4C

Structure	Level	Pattern	Image	Note
TS17: forelimb bud mesenchyme	Present		4D
TS17: forelimb bud ectoderm	Absent		4D

Structure	Level	Pattern	Image	Note
TS17: trunk sclerotome	Present		4E
TS17: trunk dermomyotome	Absent		4E
TS17: trunk myocoele	Absent		4E

Structure	Level	Pattern	Image	Note
TS19: 1st branchial arch	Present		4F
TS19: 2nd branchial arch	Present		4F
TS19: forelimb bud	Present		4F
TS19: hindlimb bud	Present		4F
TS19: nasal process	Present		4F
TS19: trunk somite	Present		4F
TS19: axial skeleton cervical region	Present	Regionally restricted	4F	Expression is detected in the nasal, ventral periorbital, facial, maxillary and cervical tissues.
TS19: branchial arch	Present	Regionally restricted	4F	Expression is detected in the nasal, ventral periorbital, facial, maxillary and cervical tissues.
TS19: mandibular process	Present	Regionally restricted	4F	Expression is detected in the nasal, ventral periorbital, facial, maxillary and cervical tissues.
TS19: nose	Present	Regionally restricted	4F	Expression is detected in the nasal, ventral periorbital, facial, maxillary and cervical tissues.

Structure	Level	Pattern	Image	Note
TS20: mandibular process	Present		4G	Expression detected in facial, maxillary and mandibular tissues.
TS20: maxillary process	Present		4G	Expression detected in facial, maxillary and mandibular tissues.

Structure	Level	Pattern	Image	Note
TS20: forelimb	Present	Regionally restricted	4H	Expression detected in the forming cartilage and muscle of the digits and wrist.

Structure	Level	Pattern	Image	Note
TS20: hindlimb	Present	Regionally restricted	4I	Expression detected in the forming cartilage and muscle of the digits and wrist