Table 2.

Summary of the Wnt protein family members.

Protein Class	Members
Secreted cysteine-rich glycoproteins	Wnt1, Wnt2, Wnt2b, Wnt3, Wnt3a, Wnt4, Wnt5a, Wnt5b, Wnt6, Wnt7a, Wnt7b, Wnt8a, Wnt8b, Wnt9a, Wnt9b, Wnt10a, Wnt10b, Wnt11, and Wnt16
Seven-pass transmembrane Frizzled receptors	Fz1, Fz-2, Fz-3, Fz-4, Fz-5, Fz-6, Fz-7, Fz-8, Fz-9, and Fz-10
Transmembrane tyrosine kinases	Ryk, ROR, and PTK7
Muscle skeletal tyrosine kinase	MuSK
Low-density lipid receptor-related proteins co-receptors	LRP5 and LRP6