Lyngstadaas A, Løbner Olesen A, Grelland E, Boye E. The gene for 2-phosphoglycolate phosphatase (gph) in Escherichia coli is located in the same operon as dam and at least five other diverse genes. Biochim Biophys Acta. 1999;1472:376-84 pubmed
..The operon, which contains aroK, aroB, urf74.3, dam, rpe, gph, and trpS, can be termed a superoperon, since it consists of (at least) seven apparently unrelated genes which are under complex regulatory control. ..