Table 3.

Differentially expressed homeobox genes

Homeobox	Gene name	Function
Msx	SLOU	Stimulation of cell proliferation, limb outgrowth, digit elongation and separation [53]
Hox6-8	ARX	Hox genes specify cell identities along the anteroposterior axis of metazoans [54] and play a central role in anterior-posterior patterning, providing a framework for the molecular comparison of animal body plan evolution [55]
	HOXD9
	ABD-B
Nk2.1	SMOX-5	Development of the larval anterior neurogenic domains [56]
Irx	SIX6	Irx genes are required for the proper formation of the posterior forebrain, midbrain, and hindbrain and, to a lesser extent, the spinal cord [57]
Meox	Meox1	Meox1 is a novel regulator of TGF-β-induced smooth muscle cell differentiation [58]