Sugino Y, Tsunasawa S, Yutani K, Ogasahara K, Suzuki M
J Biochem. 1980 Jan;87(1):351-4. doi: 10.1093/oxfordjournals.jbchem.a132746.
The trp operon of Escherichia coli cloned in a multicopy plasmid produced an amino-terminally formylated tryptophan synthase alpha-subunit, as well as the normal deformylated one.