Tooth and scale morphogenesis in shark: an alternative process to the mammalian enamel knot system

Table 1 Summary of mesenchymal gene expression patterns

Stage	EM			LM			ED			LD
	Scale	Tooth	Molar	Scale	Tooth	Molar	Scale	Tooth	Molar	Scale	Tooth	Molar
Bmp4	+	-	+ [46]	+	-	+ [46]	+	-	+ [46]	-	-	+ [46]
Msx1	-	-	+ [61]	+	-	+ [61]	+	+	+ [61]	+	+	+ [61]
Msx2	-	+	+ [61]	-	-	- [61]	+	-	+ [61]	-	-	+ [61]
Msx3	-	-	n/a	-	+	n/a	+	+	n/a	-	+	n/a
Pitx2	-	+	- [51]	-	+	- [51]	-	+	- [51]	-	+	- [51]

Summary of gene expression patterns in the mesenchymal compartment of the catshark scale and tooth buds, in comparison to data published for molar bud development in the mouse. Positive expression is represented by a +, negative expression by a –, and references for expression in mouse molar buds are cited in the table, except when non available (n/a)

ISSN: 2730-7182