Sequence 12 from Patent WO2004050694. Sequence 34 from Patent WO2005059143. Sequence 39 from Patent WO2006069711. Sequence 39 from Patent EP1908841. Methods for the production of methionin. Pgro-Expressionseinheiten. Methods for the production of methionin. Pgro expression units. MULTIPLE PROMOTERS AND THE USE THEREOF FOR GENE EXPRESSION. Pgro expression units. Sequence 34 from Patent EP1921150. Sequence 12 from patent US 7892798. Sequence 39 from patent US 7968699. JP 2008212157-A/39: MULTIPLE PROMOTERS AND THE USE THEREOF FOR GENE EXPRESSION.