^Crane، Laura J؛ Miller، David Lee (1974). "Guanosine triphosphate and guanosine diphosphate as conformation-determining molecules. Differential interaction of a fluorescent probe with the guanosine nucleotide complexes of bacterial elongation factor Tu". Biochemistry. ج. 13 ع. 5: 933–939. DOI:10.1021/bi00702a017.