Catalog number: SBB-TR0015, 50 μgHighly purified recombinant protein, which has been labeled with a single Cyanine5 (Cy5) moiety at a specific site that keeps all lysines within the protein available and has a fully functional C-terminus that allows for further conjugation into ubiquitin chains and does not affect or impairs the E1 – E2 and E3 conjugation cascade. Cy5-Ubiquitin has an excitation maximum Ex646nm and an emission maximum Em662nm. This protein was expressed in E.coli.