443 Lecture 17 building a new ship II (1)

Most commonheterofermentation dont always make it at

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Unformatted text preview: 'arOcle?' General'layout'of'the'presentaOon' final presentation due Wednesday before Thanksgiving Format: short answer questions -identity of fermentation products (3 routes, anaploretic, acetyl CoA pathway, acetyl-lactone pathway) know each. different bacteria do different things. -vary rarely do you get one fermentation product out of it. you usually get a mixture of products. most common=heterofermentation. don't always make it at time 0. have to have a modfification in the culture. sometimes culture H sometimes culture ph. all influence which products are made for the bacterium. -claustridia will make byutnol. never make 100% butynol -culture-3 types (take colony from a plate, add at time 0, see a lag, exponential growth, stationary phase, then cells die off-BATCH), a continuous culture is used in almost every industrial process, you're not limited by the lag phase or the exponential phase. you make start with fixed innoculum. then feed media, draw out a volume of media, do at same rate, media in =media out, advantage-bypass lag and exponential phase, gives you what you're interested in. batch culture-1 million Liters (reduce level of contamination)-need large innoculum. 10^9 cells start with. On the other hand with continuous cultures, 100,000 Liter, 10000, 1000, 10 L… takes longer but process is continuous. as long as you are sterile going in and going out, cultures can last for months. just replace the medium. feed media, pull out what you want. Last one is synchronous-add inoculum. NOT on exam. synchronous good to study the cell cycle. period of time [not 100%] synchronous culture-use small amount, follow something like batch, follow some form of uniform division process. In a synchronous culture, a batch is probably more of a model than continuous. -for fermentation 3 major pathways. know a bacterium that does each. -glyoxylate shunt-anaploretic reaction (L9) every bacterium in a genus carries out entire process. they may carry make malate, -not every bacterium does every process. notstart with c6 intermediate, split it, enzyme unique to glyoxylate shunt, out part of it. make succinate. It is an option for an anaploret...
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This document was uploaded on 11/11/2013.

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