The monoclonal antibody 900 recognizes elongation factor Tu (EF-Tu), a 43 kDa multifunctional protein present in Escherichia coli. EF-Tu is one of the most abundant proteins present in prokaryotes, representing about 5 % of the total cellular protein of E. coli. During protein biosynthesis, the elongation process, EF-Tu catalyzes the binding of each aminoacyl-tRNA to the ribosome. It also interacts with several macromolecules and guanine nucleotides, including EF-Ts, GDP, GTP, and some ribosomal proteins. Monoclonal antibody 900 recognizes EF-Tu in organisms belonging to bacterial and archaeal domains, yet no organisms from the eukaryotic domain. The panbacterial distribution of EF-Tu, which is present in large amounts in every prokaryotic cell, renders this protein a good candidate for diagnostic purposes. The highly conserved epitope recognized by monoclonal antibody 900 is located at the very end of the N-terminus of the EF-Tu molecule (SKEKFE).
Immuno assays, Immuno fluorescence, Western blot
For Western blotting, dilutions to be used depend on detection system applied. It is recommended that users test the reagent and determine their own optimal dilutions. The typical starting working dilution is 1:50.