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Vectorspace

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  1. I have a question on membrane fusion. http://tinypic.com/view.php?pic=fao4nk&s=6 During cell-cell fusion, proximity and localized membrane disruption are key events. Look at the accompanying picture and describe the flow of transport that must have occurred to allow formation of the final cell from the original cells and vesicles. For every fusion event, you must identify the proteins involved in trafficking and use them correctly. HINT: Remember that fusion events will MAKE new sections in the target cell or vesicle So, i know membrane-membrane recognition, proximity,Disruption of bilyar, i.e hemifusion, fully bilayer fusion are all requirements for fusion. So in the diagram, the t-snare and v-snare come closer together. I don't know how i would describe the flow of the transport to form the final cell. Thanks
  2. Hello and thanks in advance. 1) Below is a list of common weak acids that can be used to prepare buffers. Listed with each is the pKa for the first proton removed. Weak Acid pKa Conjugate Base H2C2O4 1.19 HC3H5O3 3.86 HC2H3O2 4.74 NH4+ 9.74 For each weak acid, list the chemical formula for the conjugate base in the column above. 2) You want to construct a buffer of pH 4.0. Which compounds from the previous table will you use to create your buffer? 3) Will the concentrations of weak acid and conjugate base be equal in your buffer? If not, which component will have a higher concentration? 4) Explain why you must use the Henderson-Hasselbach equation to solve for the pH of a solution containing a weak acid, but you don’t have to use that equation to solve for the pH of a solution containing a strong acid.
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