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A: These are multiple choice questions.
what is the correct method for protien purification if the PI of three protiens are:
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- The 3 proteins have the following properties. Which is the correct order of steps to extract them? + ethyl acetate, + (NH4)2SO4 at 20% saturation, centrifugation, + detergent (Triton X), buffer the lysate (pH=10), centrifugation, collect precipitate + ethyl acetate, + detergent (Triton X), + (NH4)2SO4 at 20% saturation, centrifugation, buffer the lysate (pH=10), centrifugation, collect precipitate + 1 M NaCl, + detergent (sodium dodecyI suIfate), centrifugation, +(NH4)2SO4 at 60% saturation, buffer at pH 7, centrifugation, collect precipitate + ethyl acetate, adjust pH to 7.3, centrifugation, collect supernate, +detergent (Triton X) to precipitate, +(NH4)2SO4 at 30% saturation, centrifugation, collect precipitateFor paper chromatography, the obtained Rf value of an amino acid with uncharged nonpolar R group is greater than the obtained Rf value of an amino acid with charged polar R goup. TRUE OR FALSE?We have 50 X TAE (Tris-Acetate) stock in our laboratory and the laboratory manager asks you to prepare a 2% gel using 1XTAE that you will prepare from agarose and stock. How do you prepare? (tank tray volume 250 ml).
- Please Provide the name of the following nitrogen-containing heterocyclic base for both of the followingWhat volume of water is needed to make the following primer stocks solutions? Primer 1. 25 nM (provided) Stock: 100uM Primer 2. 29nM (provided) Stock: 50uM Primer 3. 32 nM (provided) Stock: 100UM Primer 4. 50NM (provided) Stock: 50uM Primer 5. 35NM (provided) Stock: 100UMDraw Haworth projection formulas for the b-anomer of monosaccharides with each of the following Fischer projection formulas
- A student is attempting to add asparagine to a methionine that is connected to a solid polystyrene bead. They mix together the two components below with DCC, and some of the indicated product is generated. However, more happens in this mixture, resulting in multiple products. What reactivity is happening, and how can it be avoided (to give the indicated product in high yield)?In a mixture of five proteins listed, draw an elution profile (Absorbance vs. mL eluted, arbitrary) for the purification of the listed proteins on a gel filtration chromatography resin: cytochrome c (pI = 5.4; Mr = 13,000), immunoglobulin G (pI = 7.3; Mr = 145,000), ribonuclease A (pI = 9.6; Mr = 13,700), RNA polymerase (pI = 6.3; Mr = 450,000), human serum albumin (pI = 5.4; Mr = 68,500). Label your elution peaks. Draw a sketch of an SDS-PAGE, reflecting the mobility of the above mixture as they elute from the column. Label you protein bands.There is a penicillin G stock powder containing 1,000,000 units of penicillin and a streptomycin sulfate stock powder containing 25G of streptomycin. From this a 250mL stock solution needs to be made containing 5,000 units/mL of penicillin and 5,000 ug/mL of streptomycin. Can you explain how to calculate this? Please show detail, thank you.
- Following are Fischer projections for a group of five-carbon sugars, all of which are aldopentoses. Identify the pairs that are enantiomers and the pairs that are epimers. (The sugars shown here are not all of the possible five-carbon sugars.) 1 СНО 2 СНО СНО Н-С—ОН Н-С—ОН Н—С—ОН Н-С—ОН НО —С—Н Н-С—ОН Н- С—ОН НО—С— Н НО—С—Н CH̟OH CH̟OH ČH̟OH в iоchemistry |61 STATE ATION Republic of the Philippines Romblon State University Romblan, Philippines 4 СНО 5 СНО 6 СНО НО—С—Н Н-С—ОН НО -С—Н Н—С—ОН НО -С—Н НО -С—Н H-C–OH Н-С—ОН НО—С—Н CH,OH ČH,OH CH,OHWhat is the difference of measuring proteins through UV-VIS spectroscopy at 280 nm and at 595 nm with the presence of the Bradford reagent? (note: explain not less than 5 sentences).How many mL of the 1 M glucose stock solution do you need to prepare 100 mL of a 1 mM glucose solution?
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