#1,25-(OH)-D

Ca-+

Nat

ER

Na

Cytoplasmic receptor

Nuclear receptor

DNA

mRNA

#Lipid synthesis

Golgi body

Protein synthesis

Membrane lipids

CaBP

#ATPase

#Ca-+

Blood

#ATPase #Basal membrane

#Mitochondrion

Vesicle?

#Cytoplasmic #CaBP

(Ca-binding protein)

Brush border

Ca?+