Table 4.

Tissues and cells outside kidney expressing 1α-hydroxylase (CYP27b1).

epithelia	placenta	bone	immune system	endocrine glands	other
Epidermis and hair follicles (keratinocytes)	Decidua	Osteoblasts	Macrophages	Parathyroid gland	brain
Prostate	Trophoblasts	Osteoclasts	Monocytes	Pancreatic islets	liver
Colon epithelium		Osteocytes	Dendritic cells	Thyroid gland	endothelia
Mammary epithelium		Chondrocytes	T cells	Adrenal medulla
Uterus (endometrium)			B cells	Testes
Corneal epithelium				Ovary
Retinal pigment epithelium
Ciliary body epithelium