Probe:	Trps1 cDNA3
Probe preparation:	Antisense labelled with digoxigenin RNA

Structure	Level	Pattern	Image	Note
TS17: brain	Present		2A
TS17: branchial arch	Present		2A
TS17: limb	Present		2A

Structure	Level	Pattern	Image	Note
TS21: vibrissa	Very strong		2B
TS21: lower jaw	Strong		2B
TS21: nose	Strong		2B
TS21: philtrum	Strong		2B
TS21: upper jaw	Strong		2B
TS21: head	Strong	Regionally restricted	2B	Expression is in the whisker pad.
TS21: limb	Present	Regionally restricted	2B	Expression is in the joints of the limbs.
TS21: integumental system	Strong	Regionally restricted	2B	Expression is in the three tactile follicles located in the sinus and supraorbital regions.
TS21: phalanx pre-cartilage condensation	Present	Regionally restricted	2B
TS21: elbow joint primordium	Present		2B
TS21: foot joint	Present		2B
TS21: hand joint	Present		2B
TS21: hindlimb digit pre-cartilage condensation	Present		2B
TS21: hip joint primordium	Present		2B
TS21: knee joint primordium	Present		2B
TS21: shoulder joint primordium	Present		2B

Structure	Level	Pattern	Image	Note
TS21: chondrocranium	Present		2C
TS21: vertebral cartilage condensation	Present	Regionally restricted	2C	Caudal vertebral axis.

Structure	Level	Pattern	Image	Note
TS22: vibrissa	Strong		2D
TS22: brain	Present		2D
TS22: limb	Present		2D

Structure	Level	Pattern	Image	Note
TS22: hair	Absent		2E
TS22: vertebral pre-cartilage condensation	Absent		2E

Structure	Level	Pattern	Image	Note
TS23: hair follicle	Present	Regionally restricted	2F	Expression is in the mesenchyme surrounding the tactile, vibrissae, and nonvibrissae follicles of the head.
TS23: head	Present	Regionally restricted	2F	Expression is in the mesenchyme surrounding the tactile, vibrissae, and nonvibrissae follicles of the head.
TS23: vibrissa follicle	Present	Regionally restricted	2F	Expression is in the mesenchyme surrounding the tactile, vibrissae, and nonvibrissae follicles of the head.
TS23: skin	Weak	Regionally restricted	2F	weaker expression was observed in the mesenchyme surrounding the primary follicles of the trunk region

Structure	Level	Pattern	Image	Note
TS24: hair follicle	Present	Regionally restricted	2H	Expression is in the follicles at the proximal ends of the limbs and in the secondary follicles of the head and trunk region.

Structure	Level	Pattern	Image	Note
TS17: 1st branchial arch mandibular component	Present		2I
TS17: 1st branchial arch maxillary component	Present		2I
TS17: nose	Present		2I
TS17: head	Present	Regionally restricted	2I	Expression is in the philtrum and whisker pad.

Structure	Level	Pattern	Image	Note
TS21: vibrissa	Very strong		2J
TS21: lower jaw	Strong		2J
TS21: nose	Strong		2J
TS21: philtrum	Strong		2J
TS21: upper jaw	Strong		2J
TS21: head	Strong	Regionally restricted	2J
TS21: skin	Strong	Regionally restricted	2J	Expression is in the three tactile follicles located in the sinus and supraorbital regions.

Structure	Level	Pattern	Image	Note
TS22: mandible	Strong		2K
TS22: maxilla	Strong		2K
TS22: nose	Strong		2K
TS22: philtrum	Strong		2K
TS22: head	Strong	Regionally restricted	2K	Expression is in the whisker pad.

Structure	Level	Pattern	Image	Note
TS23: mandible	Strong		2L
TS23: maxilla	Strong		2L
TS23: nose	Strong		2L
TS23: philtrum	Strong		2L
TS23: head	Strong	Regionally restricted	2L	Expression is in the whisker pad.

Structure	Level	Pattern	Image	Note
TS24: mandible	Strong		2M
TS24: maxilla	Strong		2M
TS24: nose	Strong		2M
TS24: philtrum	Strong		2M
TS24: head	Strong	Regionally restricted	2M	Expression is in the whisker pad.

Structure	Level	Pattern	Image	Note
TS17: forelimb bud	Present	Regionally restricted	2N	Expression is in joints of the limbs and mesenchyme of the phalanges.

Structure	Level	Pattern	Image	Note
TS21: foot joint	Present		2O
TS21: hindlimb digit pre-cartilage condensation	Present		2O
TS21: hip joint primordium	Present		2O
TS21: knee joint primordium	Present		2O

Structure	Level	Pattern	Image	Note
TS22: hindlimb digit cartilage condensation	Present		2P

Structure	Level	Pattern	Image	Note
TS23: hindlimb phalanx	Present		2Q

Structure	Level	Pattern	Image	Note
TS24: hindlimb phalanx	Present		2R

Structure	Level	Pattern	Image	Note
TS23: forelimb phalanx	Present		2S

Structure	Level	Pattern	Image	Note
TS21: philtrum	Present		2T

Structure	Level	Pattern	Image	Note
TS21: vibrissa follicle	Strong	Regionally restricted	2U	Expression is in the dermal condensates.

Structure	Level	Pattern	Image	Note
TS23: skin	Present		2V	Expression is restricted to the mesenchyme surrounding the follicle and is completely excluded from the epidermal compartment.

Structure	Level	Pattern	Image	Note
TS24: skin	Present	Regionally restricted	2W	Expression is restricted to the mesenchyme surrounding the follicle and is completely excluded from the epidermal compartment.

Structure	Level	Pattern	Image	Note
TS24: hair follicle	Present	Regionally restricted	2X	Expression is in the follicles at the proximal ends of the limbs and in the secondary follicles of the head and trunk region.

Structure	Level	Pattern	Image	Note
TS24: hair follicle	Present	Regionally restricted	2Y	Punctate expression was observed at sites of the presumptive eyelashes.