Probe:	Gata4 probe9
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS10: embryo mesoderm	Present	Regionally restricted	4A	Expression in lateral plate mesoderm of primitive streak region and mesoderm subjacent to headfold.
TS10: allantois	Present		4A
TS10: parietal endoderm	Present		4A

Structure	Level	Pattern	Image	Note
TS15: common atrial chamber	Present			Expression at equal intensity in common atrial and ventricular chambers.
TS15: primitive ventricle	Present			Expression at equal intensity in common atrial and ventricular chambers.

Structure	Level	Pattern	Image	Note
TS20: atrium cardiac muscle	Present	Widespread		Expression throughout atrial and ventricular myocardium and endocardium.
TS20: atrium endocardial lining	Present	Widespread		Expression throughout atrial and ventricular myocardium and endocardium.
TS20: ventricle cardiac muscle	Present	Widespread		Expression throughout atrial and ventricular myocardium and endocardium.
TS20: ventricle endocardial lining	Present	Widespread		Expression throughout atrial and ventricular myocardium and endocardium.
TS20: lung	Absent

Structure	Level	Pattern	Image	Note
TS26: ventricle cardiac muscle	Strong		5E	High levels of expression throughout ventricular myocardium and endocardium during late fetal development.
TS26: ventricle endocardial lining	Strong		5E	High levels of expression throughout ventricular myocardium and endocardium during late fetal development.
TS26: gut epithelium	Present		5E
TS26: bladder	Absent		5E
TS26: lung	Absent		5E