BSCI 105 Lecture Notes - Lecture 14: Vitamin B3 Complex, Cod Liver Oil, Ionic Strength

• School: University of Maryland
• Department: Biological Sciences Program
• Course: BSCI 105
• Professor: Norma Allewell

Document Summary

Rate of reaction depends on environmental conditions: ph, temperature, ionic strength, different enzymes have different optimal conditions. Enzyme cofactors: inorganic and organic chemicals that assist enzymes during the catalysis of reactions, required for catalysis. Bind at active site and compete with substrate for binding. Penicillin inhibits lactamases, enzymes that synthesize bacterial cell walls. Blocks the enzyme from binding by directly cockblocking: noncompetitive inhibitors. Bind remote from active site; exert action at distance by altering 3d structure of enzyme. Indirectly cockblocks by changing the shape of the enzyme. The big picture: glucose goes into co2 and h20. Photosynthesis and respiration form an ecosystem cycle: light energy allows organic molecules to be synthesized in plants from co2 and h20 with the release of o2. Co2 is reduced in this reaction: cellular respiration oxidizes carbohydrates, producing co2, h2o and atp. Dinucleotides nad and fad are enzyme cofactors and redox reagents: nad -> nadh, fad -> fadh2, electron transport chain.