ZOL 341 1st Edition Lecture 23 Outline of Last Lecture I Lac operon structure II Lac operon structural genes III Lac I IV Lac operon function Outline of Current Lecture II Stem loop structures III Eukaryotic transcription IV Cis trans Current Lecture stem loop structures made of mRNA 3 4 stem loop termination stem loop halts RNA polymerase progression along the DNA within the leader region 2 3 stem loop antitermination stem loop prevents region 3 from interacting with region 4 allows RNA polymerase to continue through the leader sequence and into the structural genes gene regulation is necessary to ensure expression on genes in an accurate pattern during the various developmental stages of the life cycle differences among distinct cell types cis acting regulatory sequences bind trans acting regulatory proteins to control eukaryotic transcription activator proteins bind regulatory sequences to stimulate transcription These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute repressor proteins bind other sequences to hinder transcription core promoter region binds RNA polymerase II and its associated transcription factors immediately upstream to the start of transcription proximal elements bind regulatory proteins general TFs to aid in promoter recognition
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