phosphate homeostasis pathway 2013-02-04T10:04:15Z PW:0001182 Phosphate is an essential element with many important roles in biology, from skeletal development and integrity to metabolism and cellular signaling. The greatest amount of phosphate is found in bone and teeth. The major regulator of phosphate homeostasis is the kidney. Maintenance of proper phosphate levels is assured by an interplay of transport and signaling pathways. Sodium phosphate co-transporters, primarily type 2 and 3 and parathyroid hormone (PTH) and fibroblast growth factor 23 (FGF23) signaling are essential components. pathway vpetri inorganic chemical homeostasis pathway