STRING 9.05 
PHEX [ENSP00000368682]
 
phosphate regulating endopeptidase homolog, X-linked; Probably involved in bone and dentin mineralization and renal phosphate reabsorption
FGF23 [ENSP00000237837]
 
fibroblast growth factor 23; 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
Evidence suggesting a functional link:
Neighborhood in the Genome:  
none / insignificant.
    
Gene Fusions:  
none / insignificant.
    
Cooccurence Across Genomes:  
none / insignificant.
    
Co-Expression:  
none / insignificant.
    
Experimental/Biochemical Data:   yes (score 0.621).  
Association in Curated Databases:  
none / insignificant.
    
Co-Mentioned in PubMed Abstracts:   yes (score 0.971).  
Combined Score:
 
0.988
 
Evidence for specific actions:
Binding:yes (score: 0.800)  
Activation:yes (score: 0.800)  
Expression with Inhibition:yes (score: 0.800)