STRING 9.05 
PIGG [ENSP00000415203]
 
phosphatidylinositol glycan anchor biosynthesis, class G; Ethanolamine phosphate transferase involved in glycosylphosphatidylinositol-anchor biosynthesis. Transfers ethanolamine phosphate to the GPI second mannose
PIGO [ENSP00000339382]
 
phosphatidylinositol glycan anchor biosynthesis, class O; Ethanolamine phosphate transferase involved in glycosylphosphatidylinositol-anchor biosynthesis. Transfers ethanolamine phosphate to the GPI third mannose which links the GPI-anchor to the C-terminus of the proteins by an amide bond (By similarity)
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:  
none / insignificant.
    
Association in Curated Databases:   yes (score 0.900).  
Co-Mentioned in PubMed Abstracts:   yes (score 0.350).  
Combined Score:
 
0.909
 
Note: the two proteins have some sequence similarity (267.1 bits over 947 amino acids. click here to see the alignment).