Biology 1002B Lecture Notes - Lecture 15: Ribonuclease, Antibody, Chloroplast
9 Sep 2013
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Document Summary
Vaucheria is a cenocytic alga: it doesn"t have many cell walls, just one big tube with organelles in it. In the nucleus of a eukaryote: nucleus gene structure is more complicated than in organelles. Eukaryotic genes tend to have introns they don"t" have to, but can have hundreds. Promoters attract protein transcription factors : they are position dependent, you can"t move them around and still expect them to work, directional cannot invert it and still work. Tata box attract tata binding protein on the promoter ***missed point. All the factors bound on can be unstable so enhancer (binding site) attach with activator proteins and fold dna over to sandwich the instability. Enhancers are features of eukaryotic gene: not position dependent as long as it can bend, enhancers don"t" have polarity, it can invert and still work. We can get different expression of genes from same genome by regulating different combinations of activators.
