In nih3t3 cell , binding of __NODE__ protein and a protein fragment ( 461 1100 ) containing a __NODE__ phosphorylation site 1 6 from __SP__ __NODE__ protein is the same as binding of __NODE__ protein and a protein fragment ( 461 1100 ) containing a __NODE__ phosphorylation site 1 6 from mutant __SP__ __NODE__ protein ( K773R K779R K784R K800R ) .