Antibody:

Foxp4 antibody

Structure	Level	Pattern	Image	Note
TS20: lung epithelium	Present		4I	Expression is present in both distal and proximal airway epithelium.

Structure	Level	Pattern	Image	Note
TS22: lung epithelium	Present		4J	Expression is present in both distal and proximal airway epithelium.

Structure	Level	Pattern	Image	Note
TS22: lung epithelium	Present		4K	Expression is present in both distal and proximal airway epithelium.
TS22: lung mesenchyme	Present	Regionally restricted	4K	Expression is present in the mesenchyme directly adjacent to the proximal airway epithelium.

Structure	Level	Pattern	Image	Note
TS24: lung epithelium	Present		4L	Expression is present in both distal and proximal airway epithelium.

Structure	Level	Pattern	Image	Note
TS20: intestine epithelium	Present		5I
TS20: stomach epithelium	Present		5I
TS20: intestine	Present	Regionally restricted	5I	Expression is present in a thin band in the inner mucosal layer.

Structure	Level	Pattern	Image	Note
TS24: intestine epithelium	Present	Graded	5J	Expression is present in a decreasing gradient from the base of the villi to the top where expression is low.
TS24: intestine mesenchyme	Absent		5J	Expression is lost or dramatically reduced in the muscular wall of the hindgut after E12.5.

Structure	Level	Pattern	Image	Note
TS24: stomach epithelium	Present		5K	Expression is present throughout.
TS24: stomach mesenchyme	Absent		5K	Expression is lost or dramatically reduced in the muscular wall of the hindgut after E12.5.