FGF23, Human

(Recombinant Human Fibroblast Growth Factor 23, FGF-23)

Purity: >97% by SDS-PAGE and HPLC analyses

Source: Escherichia coli

FGF23 is a member of the Fibroblast Growth Factor family of proteins. In the FGF family, FGF23 is most closely associated with FGF15/19 and FGF21.

FGF23 shares 71% homology with mouse Fgf23 at the amino acid level. FGF23 is produced by osteocytes and osteoblasts in response to high circulating phosphate levels, elevated parathyroid hormone, and circulatory volume loading.

It functions as an endocrine phosphatonin by suppressing circulating phosphate levels. FGF23 interaction with renal proximal tubular epithelium decreases the renal resorption of phosphate by down regulating phosphate transporters and by suppressing vitamin D production. It also decreases the intestinal absorption of phosphate.

rHuFGF23 General Information
Amino Acid Sequence (228 aa):
MYPNASPLLG SSWGGLIHLY TATARNSYHL QIHKNGHVDG APHQTIYSAL MIRSEDAGFV VITGVMSRRY LCMDFRGNIF GSHYFDPENC RFQHQTLENG YDVYHSPQYH FLVSLGRAKR AFLPGMNPPP YSQFLSRRNE IPLIHFNTPI PRRHTRSAED DSERDPLNVL KPRARMTPAP ASCSQELPSA EDNSPMASDP LGVVRGGRVN THAGGTGPEG CRPFAKFI

Reconstitution:
The sample should be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in aqueous buffer containing 0.1% BSA to a concentration of 0.1 - 1.0 mg/mL. Reconstituted solutions are stable for up to one week at 2 - 8°C. Stock solutions should be aliquoted and stored at - 80°C. Further dilutions should be made in appropriate buffered solutions containing BSA or serum, and 1 μg/ml heparin sulfate.

Storage:
The lyophilized sample is stable at 2-8°C, but should be kept desiccated at -20°C for long term storage. The reconstituted sample can be apportioned into working aliquots and stored at -80°C for maximal stability. Avoid repeated freeze/thaw cycles.

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