Probe:	pBSM10
Probe preparation:	Antisense labelled with digoxigenin RNA
Visualized with:	Alkaline phosphatase

Structure	Level	Pattern	Image	Note
TS17: forelimb bud apical ectodermal ridge	Present		6A

Structure	Level	Pattern	Image	Note
TS20: vibrissa epithelium	Present	Regionally restricted	6B	Expression is strongest in the distal ectoderm associated with each forming vibrissa and sinus hair follicle.

Structure	Level	Pattern	Image	Note
TS19: footplate apical ectodermal ridge	Present		7A
TS19: handplate apical ectodermal ridge	Present		7A
TS19: mammary placode	Present		7A	Expressed in the mammary ridge, a band of raised ectoderm which runs along the lateral body wall connecting the fore and hind limb buds.

Structure	Level	Pattern	Image	Note
TS20: vibrissa follicle	Strong		7B	Expressed in the immature vibrissae hair follicles.
TS20: vibrissa	Strong	Regionally restricted	7B	Expressed in the tactile facial hair primordia.
TS20: mammary bud	Strong		7B	Expressed in the dual abdominal mammary gland anlagen.

Structure	Level	Pattern	Image	Note
TS20: limb epithelium	Weak	Regionally restricted	7C	Expressed in the apical ectodermal ridge.
TS20: vibrissa follicle	Strong		7C

Structure	Level	Pattern	Image	Note
TS10: embryo	Absent			Authors state that expression was examined on dpc 7.0-10.5; not all stages are detailed. No expression was detected in embryos younger than 10.5 dpc.