Antibody:	anti-CRBP I
Detection system:	Secondary antibody coupled to alkaline phosphatase

Structure	Level	Pattern	Image	Note
TS14: nose	Present	Uniform	2A	Homogeneous expression in ectoderm of the frontonasal area.

Structure	Level	Pattern	Image	Note
TS16: fronto-nasal process ectoderm	Present	Regionally restricted	2C
TS16: fronto-nasal process mesenchyme	Weak	Scattered	2C	No expression in mesenchyme except for a few scattered cells
TS16: nasal pit	Present	Graded	2C	Considerably more expression in lateral compared to the medial aspect.

Structure	Level	Pattern	Image	Note
TS14: branchial arch mesenchyme	Weak	Scattered	2E	No expression in mesenchyme except for a few scattered cells.

Structure	Level	Pattern	Image	Note
TS16: branchial arch	Present	Regionally restricted	2G	Expression in the central core.
TS16: branchial arch ectoderm	Present	Uniform	2G	Relatively uniform expression in ectoderm of branchial arches.
TS16: branchial arch endoderm	Present	Regionally restricted	2G	More expression in some endodermal cells than neighbouring cells.
TS16: branchial arch mesenchyme	Weak	Scattered	2G	Expression in a few scattered cells in the mesenchyme.

Structure	Level	Pattern	Image	Note
TS14: forelimb bud ectoderm	Present		3A
TS14: forelimb bud mesenchyme	Weak	Scattered	3A

Structure	Level	Pattern	Image	Note
TS16: limb ectoderm	Present		3C
TS16: limb mesenchyme	Weak	Scattered	3C	No expression in mesenchyme except for a few scattered cells.

Structure	Level	Pattern	Image	Note
TS16: trunk somite	Present	Regionally restricted		Expression in the myotome of the somites.

Structure	Level	Pattern	Image	Note
TS16: gut	Present	Regionally restricted	3E	Expression in endoderm; more extensive expression in some regions than others.