. "Protein which binds guanosine 5'-triphosphate (GTP), a ribonucleotide guanosine (a purine base guanine linked to the sugar D-ribofuranose) that carries three phosphate groups esterified to the sugar moiety." . . "GTP-binding" . "Guanosine 5'-triphosphate-binding" . "Guanosine triphosphate-binding" . . .