Fibroblast Growth Factor 23, active (FGF23), Recombinant, Human

Regulator of phosphate homeostasis. Inhibits renal tubular phosphate transport by reducing SLC34A1 levels. Upregulates EGR1 expression in the presence of KL (By similarity). Acts directly on the parathyroid to decrease PTH secretion (By similarity). Regulator of vitamin-D metabolism. Negatively regulates osteoblast differentiation and matrix mineralization. {ECO:0000250, ECO:0000269, PubMed:11062477, ECO:0000269, PubMed:11409890, ECO:0000269, PubMed:15040831, ECO:0000269, PubMed:16597617, ECO:0000269, PubMed:18282132}. Biological Activity: Fully biologically active when compared to standard. The ED50 as determined by thymidine uptake assay using FGF-receptors transfected BaF3 cells is less than 0.5ug/ml, corresponding to a specific activity of ? 2.0x10e3 IU/mg in the presence of 0.3 ug/ml of rMuKlotho and 10ug/ml of heparin. Sequence: YPNASPLLGS SWGGLIHLYT ATARNSYHLQ IHKNGHVDGA PHQTIYSALM IRSEDAGFVV ITGVMSRRYL CMDFRGNIFG SHYFDPENCR FQHQTLENGY DVYHSPQYHF LVSLGRAKRA FLPGMNPPPY SQFLSRRNEI PLIHFNTPIP RRHTRSAEDD SERDPLNVLK PRARMTPAPA SCSQELPSAE DNSPMASDPL GVVRGGRVNT HAGGTGPEGC RPFAKFI, Molecular Weight: 25.3kD, PubMed ID: 110e32749, 11062477, 11344269, 12975309, 15489334, 15340161, 11409890, 11157998, 12130585, 12952917, 15268897, 15040831, 16597617, 16638743, 18282132, 20094046, 17339340, 16151858, 15590700, 16030159, 24680727, Gene Name: FGF23,HYPF,UNQ3027/PRO9828, Swiss Prot: Q9GZV9, Storage and Stability: Lyophilized powder may be stored at -20°C. Stable for 12 months at -20°C. Reconstitute with sterile PBS. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Reconstituted product is stable for 12 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.