Antibody:	anti-Pbx1b
Detection system:	Biotinylated secondary antibody/[Strept]avidin coupled to horseradish peroxidase

Structure	Level	Pattern	Image	Note
TS17: branchial arch ectoderm	Present		1B	Expression in the surface ectoderm and mesenchyme of the branchial arches.
TS17: branchial arch mesenchyme	Present		1B	Expression in the surface ectoderm and mesenchyme of the branchial arches.

Structure	Level	Pattern	Image	Note
TS17: dermomyotome	Present		1C	Expression in dermomyotome and sclerotome of the somites
TS17: sclerotome	Present		1C	Expression in dermomyotome and sclerotome of the somites

Structure	Level	Pattern	Image	Note
TS15: foregut epithelium	Present		1D	Expression in endodermal and mesenchymal components of foregut and midgut
TS15: foregut mesenchyme	Present		1D	Expression in endodermal and mesenchymal components of foregut and midgut
TS15: midgut epithelium	Present		1D	Expression in endodermal and mesenchymal components of foregut and midgut
TS15: midgut mesenchyme	Present		1D	Expression in endodermal and mesenchymal components of foregut and midgut

Structure	Level	Pattern	Image	Note
TS19: lung mesenchyme	Present		1E	Expression in mesenchyme but not epithelium of lung anlage
TS19: lung epithelium	Absent		1E	Expression in mesenchyme but not epithelium of lung anlage

Structure	Level	Pattern	Image	Note
TS24: lung mesenchyme	Present		1F	Expression in interstitial mesenchyme of lung

Structure	Level	Pattern	Image	Note
TS19: stomach epithelium	Present		1G	Expression in mesenchyme and endoderm of stomach
TS19: stomach mesenchyme	Present		1G	Expression in mesenchyme and endoderm of stomach
TS19: pancreas primordium	Present	Regionally restricted	1G	Expression is in the mesenchyme.

Structure	Level	Pattern	Image	Note
TS21: stomach epithelium	Present		1H	Expression in mesenchyme and endoderm of stomach
TS21: stomach mesenchyme	Present		1H	Expression in mesenchyme and endoderm of stomach

Structure	Level	Pattern	Image	Note
TS24: stomach epithelium	Present	Regionally restricted	1I	Expression is restricted to submucosal tissue and outer layers of connective tissue.

Structure	Level	Pattern	Image	Note
TS20: oral epithelium	Strong	Regionally restricted	1J	Expression is in the area of the dental lamina.

Structure	Level	Pattern	Image	Note
TS21: palatal shelf mesenchyme	Present		1K
TS21: tongue mesenchyme	Present		1K
TS21: oral epithelium	Present	Regionally restricted	1K	Expression is in the area of the dental lamina.

Structure	Level	Pattern	Image	Note
TS24: oral epithelium	Present	Regionally restricted	1L	Expression is in the dental lamina.

Structure	Level	Pattern	Image	Note
TS21: vibrissa dermal component	Present	Regionally restricted	1M	Expression is in the underlying mesenchyme.
TS21: vibrissa epidermal component	Present		1M

Structure	Level	Pattern	Image	Note
TS22: vibrissa follicle	Present	Regionally restricted	1N	Expression is in the root sheath, dermal papillae and surrounding mesenchyme.

Structure	Level	Pattern	Image	Note
TS24: vibrissa follicle	Present	Regionally restricted	1O	Expression is in the root sheath, surrounding mesenchyme and dermal papillae.

Structure	Level	Pattern	Image	Note
TS19: gonadal mesenchyme	Present		1P
TS19: mesonephros mesenchyme	Present		1P

Structure	Level	Pattern	Image	Note
TS22: reproductive system mesenchyme	Present	Regionally restricted	1Q	Expression surrounding mesenchyme of paramesonephric (Mullerian) and mesonephric (Wolffian) ducts
TS22: testis mesenchyme	Present	Regionally restricted	1Q	Expression is in the interstitial cells surrounding the testicular cords.
TS22: paramesonephric duct of male	Present		1Q	The author describes expression in the Mullerian Duct.

Structure	Level	Pattern	Image	Note
TS24: maturing glomerular tuft	Present		1R	Expression in nephrogenic mesenchyme and in glomerular cells
TS24: nephrogenic zone	Present		1R	Expression in nephrogenic mesenchyme and in glomerular cells

Structure	Level	Pattern	Image	Note
TS20: vertebral cartilage condensation	Present		2A	The exact area of the section is not specified, but expression coincides with dividing cells.

Structure	Level	Pattern	Image	Note
TS20: neural retinal epithelium	Present	Regionally restricted	2C	Expression coincides with dividing cells.

Structure	Level	Pattern	Image	Note
TS20: lung	Present	Regionally restricted	2E	Expression coincides with dividing cells.

Structure	Level	Pattern	Image	Note
TS20: diencephalon	Present	Regionally restricted	2G	Expression coincides with dividing cells.

Structure	Level	Pattern	Image	Note
TS15: branchial arch ectoderm	Present

Structure	Level	Pattern	Image	Note
TS28: lung connective tissue	Present			Expression in pulmonary interstitium