Probe:	Runx2 probe4
Probe preparation:	Antisense labelled with P33 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS21: metacarpus pre-cartilage condensation	Strong	Regionally restricted	2A upper left	Strong expression in the perichondrium and to a lesser degree within chondrocytes of the metacarpal anlagen.
TS21: forelimb phalanx pre-cartilage condensation	Strong	Regionally restricted	2A upper left	Strong expression in the perichondrium and to a lesser degree within chondrocytes of the proximal phalanges, and in a region corresponding to the future distal phalanges/claws.
TS21: carpus pre-cartilage condensation	Absent		2A upper left
TS21: hand joint	Absent		2A upper left

Structure	Level	Pattern	Image	Note
TS22: humerus cartilage condensation	Strong	Regionally restricted	2B 14.5 runx2 upper	Expressed in the perichondrium, in osteoblasts, and in hypertrophic chondrocytes.

Structure	Level	Pattern	Image	Note
TS23: humerus	Strong	Regionally restricted	2B 15.5 runx2	Expressed in the perichondrium, in osteoblasts, and in hypertrophic chondrocytes.

Structure	Level	Pattern	Image	Note
TS22: elbow joint primordium	Absent		2B 14.5 runx2 bottom	No expression in cartilage or perichondrium around the future elbow joint.

Structure	Level	Pattern	Image	Note
TS22: limb digit	Present	Regionally restricted		Expressed in the perichondrium and the chondrocytes located in the proximal part of the metacarpals and phalanges.