Probe:	Irx1 probe1
Probe preparation:	Antisense labelled with digoxigenin RNA

Structure	Level	Pattern	Image	Note
TS17: limb	Absent		1A

Structure	Level	Pattern	Image	Note
TS19: handplate	Present	Regionally restricted	1B	Expression was detected in the region of the digit 2-4 primordia.

Structure	Level	Pattern	Image	Note
TS20: forelimb digit	Present	Regionally restricted	1C	Expression was detected in all of the digit primordia. Expression is high throughout the digits and shows a sharp border at the proximal part.

Structure	Level	Pattern	Image	Note
TS21: forelimb phalanx pre-cartilage condensation	Present		1D

Structure	Level	Pattern	Image	Note
TS22: forelimb phalanx cartilage condensation	Present		1E

Structure	Level	Pattern	Image	Note
TS19: footplate	Present	Regionally restricted	1F	Expression was detected in the region of the digit 2-4 primordia.

Structure	Level	Pattern	Image	Note
TS20: hindlimb digit	Present	Regionally restricted	1G	Expression was detected in all of the digit primordia. Expression is high throughout the digits and shows a sharp border at the proximal part.

Structure	Level	Pattern	Image	Note
TS21: hindlimb phalanx pre-cartilage condensation	Present		1H
TS21: metatarsus pre-cartilage condensation	Present		1H

Structure	Level	Pattern	Image	Note
TS22: hindlimb phalanx cartilage condensation	Present		1I
TS22: metatarsus cartilage condensation	Present		1I

Structure	Level	Pattern	Image	Note
TS21: phalanx pre-cartilage condensation	Present		4A	Expression was detected in the precartilage of digits 2-4.