Table 1.

Distinct properties of mammalian CCN and FGF family members.

Properties	FGF Family	CCN Family
Family members	22	6
Molecular weights	17–34 kD	1 26–42 kD
Molecular structure	Single core region	Four modules linked tandem
Receptors	Specific	Multiple and diverse
Function	Specific	Context-dependent

¹ Molecular weights of the major isoforms.