Probe:

prx-2 probe2

Structure	Level	Pattern	Image	Note
TS17: forelimb bud mesenchyme	Present	Graded	1A	Expression was present throughout the fore- and hindlimb mesoderm with high levels of expression in the anterior and posterior mesoderm, as well as in the subapical mesoderm.
TS17: hindlimb bud mesenchyme	Present	Graded	1A	Expression was present throughout the fore- and hindlimb mesoderm with high levels of expression in the anterior and posterior mesoderm, as well as in the subapical mesoderm.
TS17: 1st branchial arch	Strong		1A
TS17: 1st branchial arch mandibular component	Strong		1A
TS17: 1st branchial arch maxillary component	Strong		1A
TS17: fronto-nasal process	Strong		1A

Structure	Level	Pattern	Image	Note
TS19: limb	Present	Regionally restricted	1C	Expression was maintained in the anterior and posterior mesoderm, but was excluded from the most distal mesoderm and the core of differentiating cells within the limb buds.

Structure	Level	Pattern	Image	Note
TS20: hand	Moderate	Regionally restricted	1F	Expression was present in the handplate; however it was more restricted to the distal aspect of the autopod than prx-1.