This molecule, leucine, and phenylalanine constitute a popular chemotactic peptide. The fragment reaction tests for a radioactively labeled form of this molecule bound to puromycin, in order to determine peptidyl transferase 
This molecule, leucine, and phenylalanine constitute a popular chemotactic peptide. The fragment reaction tests for a radioactively labeled form of this molecule bound to puromycin, in order to determine peptidyl transferase activity. A C-A base pair at the top of the acceptor stem and three consecutive GC base pairs in the anticodon stem occur in tRNA that carry this molecule. A reaction that produces tetrahydrofolate creates this molecule after its precursor has been attached to tRNA. (*) EF-Tu does not recognize tRNA with this aminoacyl, preventing it from being delivered to the A site; instead, it's delivered to the P site by IF2. In prokaryotes, this molecule is corresponds to the AUG codon. For 10 points, name this modified amino acid that is used for the initiation of protein synthesis in prokaryotes.
This molecule, leucine, and phenylalanine constitute a popular chemotactic peptide.
fMet [or: N-formyl-methionine]