Citrate and calbindin can both associate with calcium, but they belong to completely different chemical categories. Citrate is a small organic acid anion used in mineral...

TRPV5 and TRPV6 are closely related epithelial calcium channels. Both form highly calcium-selective pores at the apical membrane, allowing calcium to enter cells down its electrochemical...

After calcium enters an intestinal cell through channels such as TRPV6 and moves across the cytoplasm with binding proteins such as calbindin-D9k, it still needs an...

Vitamin D3 is converted through several steps into a hormone-like signal. Its active form binds the vitamin D receptor, or VDR, which regulates selected genes rather...