Probe:

Irxl1 probe1

Structure	Level	Pattern	Image	Note
TS13: somite	Present	Regionally restricted	3A	Expression was detected in the proximal region of somites.

Structure	Level	Pattern	Image	Note
TS15: somite	Present	Regionally restricted	3B	Expression was stronger in anterior somites and was largely restricted to the dorso-medial aspect of the somites.
TS15: branchial arch	Weak		3B

Structure	Level	Pattern	Image	Note
TS17: somite	Present	Regionally restricted	3C	Expression was detected in hypaxial and epaxial domains of the somitic mesoderm.

Structure	Level	Pattern	Image	Note
TS17: limb mesenchyme	Present	Regionally restricted	3D	Expression was detected in posterior distal limb mesenchyme.
TS17: limb	Present	Regionally restricted	3D	Expression was detected in migrating myoblasts.

Structure	Level	Pattern	Image	Note
TS18: somite	Present	Regionally restricted	3F	Expression was detected in hypaxial and epaxial domains of the somitic mesoderm.
TS18: fronto-nasal process	Present		3F
TS18: limb	Present	Regionally restricted	3F	Expression was detected in migrating myoblasts.

Structure	Level	Pattern	Image	Note
TS18: forelimb bud mesenchyme	Present	Regionally restricted	3F FL	Expression was detected in posterior distal limb mesenchyme.

Structure	Level	Pattern	Image	Note
TS19: somite	Present	Regionally restricted	3G	Expression was detected in hypaxial and epaxial domains of the somitic mesoderm.
TS19: fronto-nasal process	Present		3G
TS19: limb	Present	Regionally restricted	3G	Expression was detected in migrating myoblasts.

Structure	Level	Pattern	Image	Note
TS19: forelimb bud	Present		3G FL

Structure	Level	Pattern	Image	Note
TS19: hindlimb bud	Present		3G HL

Structure	Level	Pattern	Image	Note
TS20: limb	Present	Regionally restricted	3H	Expression was detected in migrating myoblasts.
TS20: head mesenchyme	Present		3H

Structure	Level	Pattern	Image	Note
TS20: forelimb	Present		3H FL

Structure	Level	Pattern	Image	Note
TS20: hindlimb	Present		3H HL

Structure	Level	Pattern	Image	Note
TS17: myotome	Present	Regionally restricted	4A	Expression was detected in migrating myoblasts.

Structure	Level	Pattern	Image	Note
TS20: forearm mesenchyme	Present	Regionally restricted	4D	Expression was detected in soft tissue surrounding the ulna ossification center.

Structure	Level	Pattern	Image	Note
TS20: limb interdigital region mesenchyme	Present		4E

Structure	Level	Pattern	Image	Note
TS20: limb interdigital region mesenchyme	Present		4F

Structure	Level	Pattern	Image	Note
TS15: branchial arch mesenchyme	Present		5A

Structure	Level	Pattern	Image	Note
TS15: endocardial lining	Present	Regionally restricted	5B	Expression was detected in some endocardial cells in the outlfow tract and ventricular chambers.

Structure	Level	Pattern	Image	Note
TS15: endocardial lining	Present	Regionally restricted	5C	Expression was detected in some endocardial cells in the outlfow tract and ventricular chambers.

Structure	Level	Pattern	Image	Note
TS15: lens placode	Present		5D
TS15: optic cup	Present	Regionally restricted	5D	Expression was detected in the retina.

Structure	Level	Pattern	Image	Note
TS20: head mesenchyme	Present		5E
TS20: lens vesicle epithelium	Present		5E
TS20: neural retinal epithelium	Present	Regionally restricted	5E	Expression was detected in the retinal ganglion cell layer.

Structure	Level	Pattern	Image	Note
TS20: lens vesicle epithelium	Present		5F
TS20: neural retinal epithelium	Present	Regionally restricted	5F	Expression was detected in the retinal ganglion cell layer.

Structure	Level	Pattern	Image	Note
TS19: neural tube	Present	Regionally restricted	5G	Expression was detected in discrete populations of motor neurons.

Structure	Level	Pattern	Image	Note
TS20: spinal cord	Present	Regionally restricted	5H	Expression was detected in discrete populations of motor neurons.

Structure	Level	Pattern	Image	Note
TS20: embryo mesenchyme	Present	Regionally restricted	5I	Expression was detected in mesenchyme surrounding the notochord.