BIOL 43800 Study Guide - Midterm Guide: Glyoxylate Cycle, Acetyl-Coa, Hydrogen Sulfide
7 Jan 2019
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Anabolism, sulfur assimilation: sulfate h2s cysteine organic compounds. S is needed for amino acid synthesis, coenzyme synthesis. S obtained from external sources and amino acid reserves: sources: sulfate, thiosulfate, sulfite, hydrogen sulfide, cysteine, sulfur dissimilation: so4. 2: amino acid synthesis: single precursor can give ride to asp, thr, lys, met, Ile: anaplerotic reactions: replenishment of tca cycle intermediates, co2 fixation, pep carboxylase: phosphoenolpyruvate + co2 oxaloacetate +pi, pyruvate carboxylase: pyruvate +co2+ atp + h2o oxaloacetate + adp + pi, glyoxylate cycle, phosphorus assimilation. Fatty acids: synthesized from acetyl- coa, malonyl-coa and nadph. Triacylglycerols: made from fatty acids and glycerol phosphate: phosphatidic acid is an important intermediate in this pathway. Polycistronic mrna: an mrna encoding a group of co-transcribed genes. Lac repressor: tetramer of the repressor form and bind to three operator sites bends dna, prevents. Rna polymerase from accessing promoter; allolactose present binds to repressor instead: lactose absent, operon repressed and lactose present, operon induced.
