Bioc 212 Lecture 5, 6 2014

If we overshoot then the e can bind if we undershoot

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Unformatted text preview: ons. if we overshoot then the e- can bind, if we undershoot we will have energy waste. there has to be precisely set energy levels for handling es Figure 14-12b Molecular Biology of the Cell (© Garland Science 2008) Figure 14-11 Molecular Biology of the Cell (© Garland Science 2008) Figure 14-1 Molecular Biology of the Cell (© Garland Science 2008) Figure 14-3a Molecular Biology of the Cell (© Garland Science 2008) salt bbridges or hydrogen bonds allows rapid movenment of protons. Figure 14-20a Molecular Biology of the Cell (© Garland Science 2008) when e- from NADH is used to reduce the component A the proton can come in and reduce the charge. so you can capture a proton when you have a negative charge Figure 2-85 Molecular Biology of the Cell (© Garland Science 2008) How does the ETC ‘handle’ the electrons? there is a very high activation energy for O2 to capture the first esytochrome C is anchored to the membrane and it carries the e- from cytochrome b/c to sytochrome oxidase oxidizes NADH and captures the first 2e- that is gives by NADH Figure 14-26 Molecular Biology of the Cell (© Garland Science 2008) these are the 3 complexes that can handle e- at each particular energy level Figure 14-9 Molecular Biology of the Cell (© Garland Science 2008) transport of e- co transports a proton Figure 14-20b Molecular Biology of the Cell (© Garland Science 2008) Figure 14-22 Molecular Biology of the Cell (© Garland Science 2008) Figure 14-23 Molecular Biology of the Cell (© Garland Science 2008) has a hydrophobic tail so it can move pretty easily through the mebrane and it can capture either one or 2 e-. The heam groups handles one e- at a time. To full reduce O2 to water we need 4 e-. Along the ETc there are some chemistry that can accumulate all the e-. Figure 14-24 Molecular Biology of the Cell (© Garland Science 2008) heams can have multiple energy levels and can be held at different conformations. within the structure of b/c xytochrome there are specific structures for heams that can bind heam at different energy levels Figure 14-30b Molecular Biology of the Cell (© Garland Science 2008) heams couple to Cu2+ Cu2+ has various redox potential so it lies at the e...
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