Probe:	Bmp4 cDNA17
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS20: interatrial septum	Present	Regionally restricted	2E , 2F	Expression is in the myocardium.
TS20: heart	Present	Widespread	2E , 2F
TS20: endocardial cushion	Present	Regionally restricted	2F , 2E	Expression is in myocardial and mesenchymal cells adjacent to the interatrial septum.
TS20: atrioventricular valve primordium	Weak	Regionally restricted	2E , 2F	Expression is in the myocardium of the maturing atrioventricular valves.
TS20: atrioventricular canal	Weak	Regionally restricted	2F , 2E	Expression is in the myocardium of the atrioventricular junction.

Structure	Level	Pattern	Image	Note
TS21: endocardial cushion	Present	Regionally restricted	3F , 3E	Expression is in the undifferentiated mesenchyme.

Structure	Level	Pattern	Image	Note
TS20: endocardial cushion	Strong	Graded	4D , 4C	Expression is in the condensed mesenchymal cells in the periphery of the endocardial cushion and decreased gradually from the more differentiated to the immature mesenchyme.

Structure	Level	Pattern	Image	Note
TS19: outflow tract cardiac muscle	Present		6B , 6A
TS19: outflow tract endocardial cushion	Present		6B , 6A

Structure	Level	Pattern	Image	Note
TS21: outflow tract cardiac muscle	Present		6C , 6D
TS21: outflow tract endocardial cushion	Present		6C , 6D

Structure	Level	Pattern	Image	Note
TS24: endocardial cushion	Absent

Structure	Level	Pattern	Image	Note
TS17: atrioventricular canal cardiac muscle	Absent
TS17: endocardial cushion	Absent