Probe:	PPET-1 cDNA
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography
Assay notes:	Data was summarized in Table 1.

Structure	Level	Pattern	Image	Note
TS15: branchial arch artery	Moderate
TS15: dorsal aorta	Moderate
TS15: endocardial lining	Moderate
TS15: optic vesicle	Moderate
TS15: branchial arch mesenchyme	Absent
TS15: otocyst	Absent
TS15: visceral pericardium	Absent
TS15: branchial arch	Very strong	Regionally restricted		Expressed in the endothelium, not in the mesenchyme.

Structure	Level	Pattern	Image	Note
TS17: branchial arch artery	Very strong
TS17: dorsal aorta	Very strong
TS17: endocardial lining	Moderate
TS17: optic cup	Moderate
TS17: otocyst	Moderate
TS17: visceral pericardium	Moderate
TS17: branchial arch epithelium	Weak
TS17: branchial arch mesenchyme	Absent
TS17: stomach	Absent

Structure	Level	Pattern	Image	Note
TS19: branchial arch artery	Very strong
TS19: dorsal aorta	Very strong
TS19: endocardial lining	Very strong
TS19: visceral pericardium	Very strong
TS19: branchial arch epithelium	Weak
TS19: intestine	Weak
TS19: lung vascular element	Weak
TS19: stomach	Weak
TS19: branchial arch mesenchyme	Absent
TS19: bronchus	Absent
TS19: lung mesenchyme	Weak	Regionally restricted		Weak expression in the parenchyma.
TS19: lens vesicle epithelium	Moderate
TS19: otocyst	Moderate

Structure	Level	Pattern	Image	Note
TS20: arch of aorta	Very strong
TS20: dorsal aorta	Very strong
TS20: endocardial lining	Very strong
TS20: lens vesicle epithelium	Very strong
TS20: visceral pericardium	Very strong
TS20: bronchus	Absent
TS20: retina	Absent
TS20: lung mesenchyme	Weak	Regionally restricted		Weak expression in the parenchyma.
TS20: cochlea	Moderate
TS20: cornea	Moderate
TS20: intestine	Moderate
TS20: lung vascular element	Moderate
TS20: stomach	Weak

Structure	Level	Pattern	Image	Note
TS21: arch of aorta	Very strong
TS21: cochlea	Very strong
TS21: dorsal aorta	Very strong
TS21: endocardial lining	Very strong
TS21: intestine	Very strong
TS21: lens epithelium	Very strong
TS21: lung vascular element	Very strong
TS21: visceral pericardium	Very strong
TS21: bronchus	Absent
TS21: retina	Absent
TS21: cornea	Moderate
TS21: lung parenchyma	Moderate
TS21: stomach	Weak

Structure	Level	Pattern	Image	Note
TS26: descending aorta	Very strong
TS26: lung vascular element	Very strong
TS26: stomach	Very strong
TS26: endocardial lining	Weak
TS26: intestine	Weak
TS26: lens epithelium	Weak
TS26: visceral pericardium	Weak
TS26: bronchiole	Absent
TS26: bronchus	Absent
TS26: retina	Absent
TS26: lung parenchyma	Moderate