Probe:	Tbx1 cDNA2
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS4: blastocyst	Absent

Structure	Level	Pattern	Image	Note
TS11: embryo mesoderm	Present	Regionally restricted	1A	Expression is present in the distal, anterior region of the egg cylinder, rostral to the node. It was observed no where else.
TS11: embryo ectoderm	Absent		1A	Expression is present in the distal, anterior region of the egg cylinder, rostral to the node. It was observed no where else.
TS11: embryo endoderm	Absent		1A	Expression is present in the distal, anterior region of the egg cylinder, rostral to the node. It was observed no where else.

Structure	Level	Pattern	Image	Note
TS15: otocyst epithelium	Present	Regionally restricted	2A	Expression is present in the epithelium of the caudal half of the otic vesicle.
TS15: head mesenchyme	Present	Regionally restricted	2A	Expression is present in the mesenchyme surrounding the otic vesicle and ventral to the hindbrain.
TS15: 1st branchial arch mesenchyme	Present		2A	Expression is present in the central core of the pharnygeal arches.
TS15: 2nd branchial arch mesenchyme	Present		2A	Expression is present in the central core of the pharnygeal arches.
TS15: 3rd branchial arch mesenchyme	Present		2A	Expression is present in the central core of the pharnygeal arches.
TS15: 1st branchial arch ectoderm	Present		2A	Expression is present in the pharyngeal pouch epithelium.
TS15: 2nd branchial arch ectoderm	Present		2A	Expression is present in the pharyngeal pouch epithelium.
TS15: 3rd branchial arch ectoderm	Present		2A	Expression is present in the pharyngeal pouch epithelium.

Structure	Level	Pattern	Image	Note
TS20: semicircular canal epithelium	Present		2D , 2C
TS20: cardiovascular system	Present	Regionally restricted	2D , 2C	Expression is present in the dorsolateral juglar lymph sacs and surrounding tissue.

Structure	Level	Pattern	Image	Note
TS20: cochlear duct epithelium	Present		2E
TS20: head mesenchyme	Present	Regionally restricted	2E	Expression is present in the mesenchyme surrounding the cochlear duct.

Structure	Level	Pattern	Image	Note
TS20: tongue muscle	Present		2F	Expression is present in the myogenic core.
TS20: dental placode	Present	Regionally restricted	2F	Expression is present in the incisor tooth buds.
TS20: head mesenchyme	Present	Regionally restricted	2F	Expression is present in the mesenchyme surrounding Rathke's pouch.

Structure	Level	Pattern	Image	Note
TS20: lung epithelium	Present		2G
TS20: lung mesenchyme	Absent		2G
TS20: tail sclerotome	Present	Regionally restricted	2G	Expression in present in the ventral half of the rostral, less condensed portion of each sclerotome.

Structure	Level	Pattern	Image	Note
TS20: tail sclerotome	Present	Regionally restricted	2H	Expression in present in the ventral half of the rostral, less condensed portion of each sclerotome.

Structure	Level	Pattern	Image	Note
TS20: body wall	Absent
TS20: genital tubercle	Absent			There is no expression in the genital papilla.
TS20: gonad	Absent			There is no expression in the genital ridge.
TS20: gut mesenchyme	Absent			There is no expression in the gut muscle.
TS20: heart atrium	Absent
TS20: heart ventricle	Absent
TS20: forelimb	Absent
TS20: hindlimb	Absent
TS20: mandibular process mesenchyme	Absent
TS20: maxillary process mesenchyme	Absent
TS20: mesonephros	Absent
TS20: metanephros	Absent
TS20: myotome	Absent
TS20: dorsal root ganglion	Absent
TS20: trigeminal ganglion	Absent
TS20: hindbrain	Absent
TS20: neurohypophysis infundibulum	Absent
TS20: neural retinal epithelium	Absent
TS20: pinna	Absent
TS20: rib pre-cartilage condensation	Absent