Antibody:	MEC 13.3
Detection system:	Secondary antibody coupled to Alexa Fluor 488

Structure	Cell Type	Level	Pattern	Image	Note
TS28: blood vessel	endothelial cell of placenta	Present		1H , 1I	Expression was detected in the endothelial cells of the maternal decidua where it co-localized with Egfl7.
TS28: decidua	endothelial cell of placenta	Present		1H , 1I	Expression was detected in the endothelial cells of the maternal decidua where it co-localized with Egfl7.

Structure	Cell Type	Level	Pattern	Image	Note
TS20: extraembryonic vascular system	endothelial cell of placenta	Present	Regionally restricted	1L , 1M	Expression was detected in the fetal endothelial cells of the placenta where it co-localized with Egfl7.
TS20: labyrinthine zone	endothelial cell of placenta	Present	Regionally restricted	1L , 1M	Expression was detected in the fetal endothelial cells of the placenta where it co-localized with Egfl7.

Structure	Level	Pattern	Image	Note
TS17: extraembryonic vascular system	Present		4D , 4E
TS17: labyrinthine zone	Present		4D , 4E

Structure	Level	Pattern	Image	Note
TS17: extraembryonic vascular system	Present		4H , 4I	Expression level appears unchanged in BPH/5 placentas compared to C57BL/6.
TS17: labyrinthine zone	Present		4H , 4I	Expression level appears unchanged in BPH/5 placentas compared to C57BL/6.

Structure	Cell Type	Level	Pattern	Image	Note
TS28: blood vessel	endothelial cell of placenta	Present		S2A CD31 top , S2A Merge top	Expression was detected in the endothelial cells of the maternal decidua where it co-localized with Egfl7.
TS28: decidua	endothelial cell of placenta	Present		S2A CD31 top , S2A Merge top	Expression was detected in the endothelial cells of the maternal decidua where it co-localized with Egfl7.

Structure	Cell Type	Level	Pattern	Image	Note
TS17: extraembryonic vascular system	endothelial cell of placenta	Present		S2A CD31 bottom , S2A Merge bottom	Expression was detected in the fetal endothelial cells of the placenta where it co-localized with Egfl7.
TS17: labyrinthine zone	endothelial cell of placenta	Present		S2A CD31 bottom , S2A Merge bottom	Expression was detected in the fetal endothelial cells of the placenta where it co-localized with Egfl7.

Structure	Cell Type	Level	Pattern	Image	Note
TS26: extraembryonic vascular system	endothelial cell of placenta	Present		S2B Merge , S2B CD31	Expression was detected in the fetal endothelial cells of the placenta where it co-localized with Egfl7.
TS26: labyrinthine zone	endothelial cell of placenta	Present		S2B Merge , S2B CD31	Expression was detected in the fetal endothelial cells of the placenta where it co-localized with Egfl7.