Probe:	Sox10 cDNA7
Probe preparation:	Antisense labelled with digoxigenin RNA

Structure	Level	Pattern	Image	Note
TS15: sclerotome	Present	Regionally restricted	1A	Neural crest cells migrated normally into the anterior sclerotome.

Structure	Level	Pattern	Image	Note
TS15: trunk mesenchyme derived from neural crest	Present	Regionally restricted	1D	Neural crest cells accumulated in the migration staging area next to the neural tube at the level of the intersomitic furrow, and clustered into sympathetic anlagen at the dorsal aorta.

Structure	Level	Pattern	Image	Note
TS15: sclerotome	Present	Regionally restricted	1G	Neural crest cells migrated normally into the anterior sclerotome.
TS15: trunk mesenchyme derived from neural crest	Present	Regionally restricted	1G	Neural crest cells clustered into sympathetic anlagen at the dorsal aorta.

Structure	Level	Pattern	Image	Note
TS15: sclerotome	Present	Regionally restricted	1J	Neural crest cells accumulated in the migration staging area next to the neural tube at the level of the posterior sclerotome.

Structure	Level	Pattern	Image	Note
TS15: sclerotome	Present	Widespread	1B	Neural crest cells migrated in an almost continuous band along the rostrocaudal axis.

Structure	Level	Pattern	Image	Note
TS15: trunk mesenchyme derived from neural crest	Present	Regionally restricted	1E	Neural crest cells accumulated in the migration staging area next to the neural tube at the level of the intersomitic furrow, but maintained a ventromedial path. Neural crest cells also clustered into sympathetic anlagen at the dorsal aorta.

Structure	Level	Pattern	Image	Note
TS15: sclerotome	Present	Regionally restricted	1H	Neural crest cells maintained a ventromedial path.
TS15: trunk mesenchyme derived from neural crest	Present	Regionally restricted	1H	Neural crest cells clustered into sympathetic anlagen at the dorsal aorta.

Structure	Level	Pattern	Image	Note
TS15: sclerotome	Present	Regionally restricted	1K	Neural crest cells maintained a ventromedial path.
TS15: trunk mesenchyme derived from neural crest	Present	Regionally restricted	1K	Neural crest cells clustered into sympathetic anlagen at the dorsal aorta.

Structure	Level	Pattern	Image	Note
TS15: trunk mesenchyme derived from neural crest	Present	Regionally restricted	1C	Excess neural crest cells travelled through the intersomitic furrow on dorsolateral and ventromedial paths, few cells migrated into the anterior sclerotome.
TS15: sclerotome	Present	Regionally restricted	1C	Few neural crest cells migrated into the anterior sclerotome.

Structure	Level	Pattern	Image	Note
TS15: trunk mesenchyme derived from neural crest	Present	Regionally restricted	1F	Excess neural crest cells travelled through the intersomitic furrow on dorsolateral and ventromedial paths.

Structure	Level	Pattern	Image	Note
TS15: sclerotome	Present	Regionally restricted	1I	Few neural crest cells migrated into the anterior sclerotome.

Structure	Level	Pattern	Image	Note
TS15: sclerotome	Present	Regionally restricted	1L	Neural crest cells accumulated in the migration staging area next to the neural tube at the level of the posterior sclerotome.

Structure	Level	Pattern	Image	Note
TS15: trunk mesenchyme derived from neural crest	Present	Regionally restricted	3C	Neural crest cells preferentially migrated through the intersomitic furrow at caudal levels, but through both anterior and posterior sclerotome at rostral levels.

Structure	Level	Pattern	Image	Note
TS15: trunk mesenchyme derived from neural crest	Present	Regionally restricted	3D	At forelimb level, both ectopic migratory patterns overlapped, with excess neural crest cells in the intersomitic furrow and invasion of both anterior and posterior sclerotome halves.

Structure	Level	Pattern	Image	Note
TS15: sclerotome	Present	Regionally restricted	3E	Neural crest cells invasion in anterior sclerotome.

Structure	Level	Pattern	Image	Note
TS15: sclerotome	Present	Regionally restricted	3F	Neural crest cells invasion in posterior sclerotome.

Structure	Level	Pattern	Image	Note
TS15: trunk mesenchyme derived from neural crest	Present	Regionally restricted	3G	Neural crest cells preferentially migrated through the intersomitic furrow at caudal levels, but through both anterior and posterior sclerotome at rostral levels.

Structure	Level	Pattern	Image	Note
TS15: trunk mesenchyme derived from neural crest	Present	Regionally restricted	3H	At forelimb level, both ectopic migratory patterns overlapped, with excess neural crest cells in the intersomitic furrow and invasion of both anterior and posterior sclerotome halves.

Structure	Level	Pattern	Image	Note
TS15: sclerotome	Present	Regionally restricted	3I	Neural crest cells invasion in anterior sclerotome.

Structure	Level	Pattern	Image	Note
TS15: sclerotome	Present	Regionally restricted	3J	Neural crest cells invasion in posterior sclerotome.