8-Bromo TNP-GTP (tetrasodium)

8-Bromo TNP-GTP (8-Bromo TNP-Guanosine 5'-triphosphate) tetrasodium is a fluorescent TNP-GTP analogue with a TNP fluorophore and a bromo group at the 8-position. 8-Bromo TNP-GTP tetrasodium can be used to analyze the binding activity of GTP-binding proteins (such as Ras and Gα subunits).