Antibody:	P2R10
Detection system:	Secondary antibody coupled to Cy3

Structure	Level	Pattern	Image	Note
TS19: perioptic mesenchyme	Present		2A/E

Structure	Level	Pattern	Image	Note
TS21: cornea epithelium	Strong		2B/F
TS21: cornea stroma	Strong		2B/F
TS21: extrinsic ocular pre-muscle mass	Strong		2B/F
TS21: perioptic mesenchyme	Weak		2B/F
TS21: lens	Absent		2B/F
TS21: neural retina	Absent		2B/F
TS21: optic stalk	Absent		2B/F	No expression in the neural layer of the optic stalk.

Structure	Level	Pattern	Image	Note
TS23: eye anterior segment	Strong	Regionally restricted	2C/G	Stronger expression in iris.
TS23: cornea epithelium	Weak		2C/G
TS23: cornea stroma	Weak		2C/G

Structure	Level	Pattern	Image	Note
TS26: iris	Present		2D/H	Expression reduced everywhere except the iris.

Structure	Level	Pattern	Image	Note
TS21: molar dental lamina	Present		2I/L
TS21: upper jaw molar epithelium	Present		2I/L
TS21: upper jaw molar mesenchyme	Absent		2I/L

Structure	Level	Pattern	Image	Note
TS23: lower jaw incisor enamel organ	Present		2J/M
TS23: upper jaw incisor enamel organ	Present		2J/M

Structure	Level	Pattern	Image	Note
TS26: lower jaw incisor dental lamina	Present		2K/N
TS26: lower jaw incisor enamel organ	Present		2K/N

Structure	Level	Pattern	Image	Note
TS15: heart atrium	Present	Regionally restricted	3A/F	Expression in wall of left atrium.

Structure	Level	Pattern	Image	Note
TS19: left atrium	Present	Regionally restricted	3B/G	Expression in wall of left atrium.
TS19: septum primum	Present		3B/G

Structure	Level	Pattern	Image	Note
TS20: left atrium	Present	Regionally restricted	3C/H	Expression in walls of left and right atria.
TS20: right atrium	Present	Regionally restricted	3C/H	Expression in walls of left and right atria.
TS20: septum primum	Present		3C/H
TS20: endocardial cushion	Absent		3C/H

Structure	Level	Pattern	Image	Note
TS15: gut	Present	Regionally restricted	3D/I	Expression in left wall of gut tube.
TS15: left vitelline vein	Present	Regionally restricted	3D/I	Expression in wall of left vitelline vein.

Structure	Level	Pattern	Image	Note
TS24: midgut	Present		3E/J

Structure	Level	Pattern	Image	Note
TS17: Rathke's pouch	Present		4A/F

Structure	Level	Pattern	Image	Note
TS23: pituitary gland	Present		4B/G

Structure	Level	Pattern	Image	Note
TS19: umbilical artery	Present	Regionally restricted	4C/H	Expression in walls of veins and arteries in the umbilical region.
TS19: umbilical vein	Present	Regionally restricted	4C/H	Expression in walls of veins and arteries in the umbilical region.

Structure	Level	Pattern	Image	Note
TS26: umbilical artery	Present	Regionally restricted	4D/I	Expression in walls of veins and arteries in the umbilical region.
TS26: umbilical vein	Present	Regionally restricted	4D/I	Expression in walls of veins and arteries in the umbilical region.

Structure	Level	Pattern	Image	Note
TS20: left lung mesenchyme	Present		4E/J

Structure	Level	Pattern	Image	Note
TS26: umbilical blood vessel	Present	Regionally restricted	4K	Authors report nuclear localization of expression in the umbilicus.

Structure	Level	Pattern	Image	Note
TS26: incisor	Present	Regionally restricted	4L	Authors report nuclear localization of expression in the umbilicus.

Structure	Level	Pattern	Image	Note
TS15: umbilical artery	Present	Regionally restricted		Expression in walls of veins and arteries in umbilical region.
TS15: umbilical vein	Present	Regionally restricted		Expression in walls of veins and arteries in umbilical region.
TS15: hindlimb ridge	Present			Authors report expression in hindlimb buds.

Structure	Level	Pattern	Image	Note
TS20: common dorsal aorta	Weak	Regionally restricted		Weak expression in wall of descending thoracic aorta.
TS20: posterior cardinal vein	Weak	Regionally restricted		Weak expression in left posterior cardinal vein.
TS20: umbilical blood vessel	Present	Regionally restricted		Authors report nuclear localization of expression in the umbilicus.

Structure	Level	Pattern	Image	Note
TS21: meninges	Present	Regionally restricted		Authors report expression in mesenchyme of outer table of primitive ectomeninx.

Structure	Level	Pattern	Image	Note
TS22: heart	Absent
TS22: lung	Absent
TS22: trunk musculature	Present	Regionally restricted		Expression in cutaneous muscles of the trunk.
TS22: intercostal muscle	Present
TS22: eye	Present	Regionally restricted		Authors report nuclear localization of expression in the eye.

Structure	Level	Pattern	Image	Note
TS23: nasal mesenchyme	Present	Regionally restricted		Expression in mesenchyme adjacent to nasal structures.
TS23: diencephalon	Present