MICR 803 Study Guide - Comprehensive Final Exam Guide - Protein, Glucose, Enzyme
21 Nov 2018
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Laci: transcribed into mrna into protein laci repressor, binds to the lac operator. Lac repressor joins the lac operator? when lactose is absent. Lactose permease molecules transport lactose inside the cell. B galactosidase breaks down lactose into galactose and glucose, isomerizes lactose into allolactose: allows rna to do transcription. Glucose absent, lactose present, lac operon is induced by allolactose camp: must bind to the promoter region to recuitre rna polymerase to the operon. Glucose and lactose present in the ecoli: the cells utilize glucose first, then during second groth use lactose (catabolite repression) proteins. Primary: sequence of amino acids in the polypeptide chain. Sequence determined by the dna that encodes for that protein. Changing one amino acid can change the proteins sequence, can affect proteins overall structure and function. Secondary structure: local folded structures that form within a polypeptide due to interaction between atoms of the back bone. Secondary structure does not involve the r groups (key)
