PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 18854029-1 2008 BACKGROUND: Human ART4, carrier of the GPI-(glycosyl-phosphatidylinositol) anchored Dombrock blood group antigens, is an apparently inactive member of the mammalian mono-ADP-ribosyltransferase (ART) family named after the enzymatic transfer of a single ADP-ribose moiety from NAD+ to arginine residues of extracellular target proteins. Ribose 257-263 ADP-ribosyltransferase 3 (inactive) Homo sapiens 18-21