Probe:

Epha4 probe12

Structure	Level	Pattern	Image	Note
TS17: tail	Present		6A
TS17: tail unsegmented mesenchyme	Present	Regionally restricted	6A	Expression was detected at the rostral end of the unsegmented paraxial mesoderm.
TS17: tail somite	Present	Regionally restricted	6A	Signal was confined to a stripe at the rostral end of the recently formed somite and a broader stripe encompassing the next, epithelialising somite.

Structure	Level	Pattern	Image	Note
TS17: tail paraxial mesenchyme	Present	Regionally restricted	6B	Expression was detected in the paraxial mesoderm at the correct distance from the tail bud. The signal occupied a rostrocaudally broadened, but dorsoventrally shortened domain with poorly defined borders.

Structure	Level	Pattern	Image	Note
TS17: tail	Present		6C	Expression was like wild type.

Structure	Level	Pattern	Image	Note
TS17: tail	Weak	Regionally restricted	6D	Weaker signal was detected in broad, poorly demarcated stripes of almost equal intensity.