Nucleic acid molecule comprising (in 5'-3' transcription direction) (a) a promoter; (b) a transcriptable nucleic acid sequence or a nucleic acid sequence for inserting in to a transcriptable nucleic acid sequence; (c1) a first nucleic acid sequence, which corresponds to the 3'-non-translated region of a gene or is derived from it; and (c2) a second nucleic acid sequence, which corresponds to the 3'-non-translated region of a gene or is derived from it, is new. Independent claims are included for: (1) a nucleic acid molecule comprising (in 5'-3' transcription direction) (a) a promoter; (b) a transcriptable nucleic acid sequence or a nucleic acid sequence for inserting in to a transcriptable nucleic acid sequence; and (c) a nucleic acid sequence with a transcription under control of (a), where the nucleic acid sequence codes for a nucleotide sequence of at least 20 sequentially arranged A-nucleotide in the transcript; (2) a nucleic acid molecule obtained after linearization; (3) a RNA obtained by transcription,
