Probe:	alpha2(XI) exon 6-8 probe
Probe preparation:	Antisense labelled with digoxigenin RNA
Visualized with:	Alkaline phosphatase

Structure	Level	Pattern	Image	Note
TS19: notochord	Absent			No significant expression in notochord or other tissues in axial skeleton.
TS19: sclerotome	Absent			No significant expression in notochord or other tissues in axial skeleton.

Structure	Level	Pattern	Image	Note
TS20: notochord	Absent			No significant expression in notochord or other tissues in axial skeleton.
TS20: sclerotome	Absent			No significant expression in notochord or other tissues in axial skeleton.

Structure	Level	Pattern	Image	Note
TS20: nasal mesenchyme	Weak	Regionally restricted	2E	Faint expression in mesenchymal condensations forming nasal capsule.
TS20: nasal septum	Weak		2E

Structure	Level	Pattern	Image	Note
TS21: limb	Weak	Regionally restricted	2F	Weak expression, more promient at periphery of cartilaginous condensations.

Structure	Level	Pattern	Image	Note
TS23: cartilage	Present	Regionally restricted	3C	Authors state that expression was not prominent in cartilaginous tissues under low magnification.

Structure	Level	Pattern	Image	Note
TS23: periosteum	Present	Regionally restricted	4D	Expression in immature periosteum.
TS23: radius	Present	Regionally restricted	4D	Expression in immature periosteum.

Structure	Level	Pattern	Image	Note
TS23: chondrocranium	Strong	Regionally restricted	5C	High level of expression in mesenchymal cell layers differentiating into osteoblasts.