Antibody:

MEC 13.3

Structure	Level	Pattern	Image	Note
TS15: extraembryonic blood vessel	Present		4q
TS15: chorionic plate	Present	Regionally restricted	4q	Expression is in the endothelium.
TS15: labyrinthine zone	Present	Regionally restricted	4q	Expression is in the endothelium.

Structure	Level	Pattern	Image	Note
TS15: extraembryonic blood vessel	Present		4r	Expression in this mutant is the same as in wild-type.
TS15: chorionic plate	Present	Regionally restricted	4r	Expression in this mutant is the same as in wild-type.
TS15: labyrinthine zone	Present	Regionally restricted	4r	Expression in this mutant is the same as in wild-type.

Structure	Level	Pattern	Image	Note
TS17: extraembryonic blood vessel	Present	Regionally restricted	4s	Expression is in endothelial cells.
TS17: chorionic plate	Present	Regionally restricted	4s	Expression is in endothelial cells.
TS17: labyrinthine zone	Present	Regionally restricted	4s	Expression is in endothelial cells.

Structure	Level	Pattern	Image	Note
TS17: extraembryonic blood vessel	Present	Regionally restricted	4t	Expression is in endothelial cells and is the same as in wild-type in the chorionic plate but greatly reduced in the labyrinth layer.
TS17: chorionic plate	Present	Regionally restricted	4t	Expression in endothelial cells of the chorionic plate is the same as in wild-type.
TS17: labyrinthine zone	Weak	Regionally restricted	4t	Expression is in endothelial cells in the reduced labyrinth layer.

Structure	Level	Pattern	Image	Note
TS17: brain blood vessel	Present		5a

Structure	Level	Pattern	Image	Note
TS17: brain blood vessel	Present		5b	The pattern of expression varies from wild-type due to the disorganized pattern of the vasculature of the mutant embryo.

Structure	Level	Pattern	Image	Note
TS17: yolk sac blood vessel	Present		5c

Structure	Level	Pattern	Image	Note
TS17: yolk sac blood vessel	Present		5d	The pattern of expression in this mutant varies from wild-type and lacked major blood vessels and instead retained a primitive capillary plexus.