Probe:	Lsamp 1a-specific probe
Probe preparation:	Antisense labelled with digoxigenin RNA

Structure	Level	Pattern	Image	Note
TS20: central nervous system	Present	Widespread	1A	Highly expressed throughout developing central nervous system, including telencephalic vesicles, diencephalon, mesencephalon, metencephalon, myelencephalon and spinal cord
TS20: facial ganglion	Weak		1A	Expression in facio-acoustic ganglion (VII/VIII) complex.
TS20: vestibulo-cochlear ganglion	Weak		1A	Expression in facio-acoustic ganglion (VII/VIII) complex.
TS20: face	Present	Regionally restricted	1A	Expression in a restricted area of ventral frontonasal region.
TS20: hindlimb	Weak		1A	Expression in proximal part of hindlimb

Structure	Level	Pattern	Image	Note
TS20: facial ganglion	Weak		1A'	Expression in facio-acoustic ganglion (VII/VIII) complex.
TS20: vestibulo-cochlear ganglion	Weak		1A'	Expression in facio-acoustic ganglion (VII/VIII) complex.
TS20: lens primordium	Present		1A'

Structure	Level	Pattern	Image	Note
TS20: hindlimb	Present	Regionally restricted	1A''	Expression in proximal part of hindlimb

Structure	Level	Pattern	Image	Note
TS20: spinal cord	Present	Regionally restricted	1H	Robust bilateral expression throughout lateral sides of spinal cord.
TS20: dorsal root ganglion	Present	Widespread	1H	Expression thoughout dorsal root ganglia.

Structure	Level	Pattern	Image	Note
TS21: central nervous system	Present	Widespread	2A	Highly expressed throughout developing central nervous system, including telencephalic vesicles, diencephalon, mesencephalon, metencephalon, myelencephalon and spinal cord.
TS21: ear	Strong	Regionally restricted	2A	expression
TS21: forelimb interdigital region mesenchyme	Present		2A
TS21: hindlimb interdigital region mesenchyme	Present		2A

Structure	Level	Pattern	Image	Note
TS21: lens	Present	Regionally restricted	2A'	Distinct expression within center of lens.
TS21: eye	Present	Diffuse	2A'	Diffuse expression around eye.
TS21: ear	Strong	Regionally restricted	2A'	Strong expression in posterior of ear.
TS21: vibrissa follicle	Present	Regionally restricted	2A'	Profound expression around developing whisker follicles and in whisker follicles proximally.

Structure	Level	Pattern	Image	Note
TS21: limb interdigital region mesenchyme	Present		2A''
TS21: mammary bud	Present	Regionally restricted	2A''	Expression in region around mammary bud.

Structure	Level	Pattern	Image	Note
TS21: dorsal root ganglion	Present	Widespread	2H	Expression thoughout dorsal root ganglia.

Structure	Level	Pattern	Image	Note
TS21: olfactory lobe	Weak
TS21: spinal cord	Present	Regionally restricted		Expression throughout lateral sides of spinal cord.