9.1Introduction Coding strand of dna has the same sequence as mRNA Downstream identifies sequences proceeding farther in the direction of expression; for example, the coding region is downstream of the initiation codon Primary transcript is the original unmodified RNa product corresponding to a transcription unit Promoter is a region of DNA involved in binding of RNa polymerase to initiate transcription RNA polymerases are enzymes that synthesize RNa using a dNa template (formally described as DNA-dependent rna polymerases) Terminator is a sequence of DNA, represented at the end of the transcript, that causes rna polymerase to terminate transcription Transcription unit is the distance between sites of initiation and termination by RNA polymerase; may include more than one gene Upstream identifies sequences proceeding in the opposite direction from expression; for example, the bacterial promoter is upstream from the transcription unit, the initiation codon is upstream of the coding region 请莘大Coding strand of DNA has the same sequence as mRNA. Downstream identifies sequences proceeding farther in the direction of expression; for example, the coding region is downstream of the initiation codon. Primary transcript is the original unmodified RNA product corresponding to a transcription unit. Promoter is a region of DNA involved in binding of RNA polymerase to initiate transcription. RNA polymerases are enzymes that synthesize RNA using a DNA template (formally described as DNA-dependent RNA polymerases). Terminator is a sequence of DNA, represented at the end of the transcript, that causes RNA polymerase to terminate transcription. Transcription unit is the distance between sites of initiation and termination by RNA polymerase; may include more than one gene. Upstream identifies sequences proceeding in the opposite direction from expression; for example, the bacterial promoter is upstream from the transcription unit, the initiation codon is upstream of the coding region. 9.1 Introduction