4. Use the cartoon protein below to answer the following questions. Assume the rounder subunits are 45 kDa and the star shaped group is 27 kDa. The lines represent disulfide bonds.
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- 1. You want to purify a protein using anion exchange column chromatography. In this technique, the solid state beads are positively charged. What charge would you want your protein to have in order for it to "stick" to the beads? Neutral Positive Negative 2. In your anion exchange experiment, your protein of interest has a pI of 6.0. Which of the following buffer solutions would you want to use when loading your protein extract onto the column so that your protein "sticks" to the beads? pH 4.5 pH 7.3 pH 6.0 3. You want to analyze your chromatography results using gel electrophoresis. If your protein is a pentamer consisting of 2 alpha subunits, 1 beta subunit, and 2 gamma subunits, how many bands would you expect to see on your gel? The alpha subunits are 32kDa. The beta subunit is 32kDa. The gamma subunits are 15kDa. 1 5 2 3 4. You want to analyze your chromatography results using gel electrophoresis. If your protein is a pentamer…2 a. You are trying to purify protein C from a mixture of proteins noted in the above Table. If you had only one type of column to choose from, which one would allow you to purify protein C with the least number of contaminants? Size exclusion column Ion exchange column Affinity chromatography using glucose as the bait Affinity chromatography using NAD as the bait Please explain why you chose the column above based upon the properties of the column AND the proteins in the Table.Consider the following properties of the protein components of a sample mixture as provided in the table below: 1. if the mixture is subjected to gel filtration chromotography which protein component elute first? 2. if the mixture is subjected to isoelectric focusing which protein will stop m oving nearest to the positive electrode? 3. if the mixture is subjected to cation-exchange chromotography using a buffer at ph 7 which protein will bind to the resin? 4.if the mixture is subjected to SDS-PAGE which protein will be at bottomost portion of gel? 5.if the mixture is subjected to hydrophobic interaction chromotography which protein will bind most strongly to the resin?
- Remember that DNA is a sequence of the letters A,C,T, and G. A binds with T and C binds with G. Solutions are specified by the DNA sequence, such as ACAC or TG, and by the concentration in units of micromolar (uM = 10-M) Consider mixing 30ml of 0.30µM ACAC with 45ml of 0.50pM TG. Predict what reactants and products should be present in the final solution and then check your answer in the virtual lab. (Please give your final answer in total nanomoles (10 moles) for each species in the solution)SDS-PAGE gels are used to study changes in protein primary structure. Which of the following statements about SDS-PAGE gels is correct? A. The negatively charged proteins will move towards the negatively charged electrode in the SDS-Page chamber B. A detergent is needed to disrupt protein secondary, tertiary, and quaternary structure before a gel can be run C. No "stains" or other treatments are needed to "see" the protein bands on a gel D. Long polypeptides move a further distance from the loading well in a SDS-PAGE gel than short polypeptidesTo prepare a gel sample, you want to load 50 ng total of protein/well. You have added 200 μL of protein in 800 µL reagent and measured your sample by Bradford A595 to be 0.7 mg/mL - your dilution is unaccounted for at this point. Assuming a total final volume of 20 μL, what volume of protein sample, buffer and 4X SDS PAGE Loading Dye needs to be mixed to create a final sample of 50 ng protein in 20 μL?
- Consider the following protein mixture: Protein A B C D Molecular Weight (kDa) 50 150 200 350 Affinity to Metal ion === Zn²+ === 1. Using hydrophobic interaction chromatography, the protein that will be eluted last is [Select] 2. Using affinity chromatography, the protein that will be eluted last in a Zn²+-containing column is 3. The protein with the fastest migration towards the anode in SDS-PAGE is [Select] IpH value 7 3 9 5 [Select] [Select] 4. Using a buffer solution with a pH of 4, the protein that will bind to an anion exchanger is 5. The protein that will be eluted last in a gel filtration column is [Select] 6. Using isoelectric focusing, the protein that will have a protein band nearest to the cathode (negative electrode) is [Select] % Hydrophobicity 20 45 75 55The following proteins were separated by SDS-PAGE in the presence of mercaptoethanol. Sketch the relative positions of the various polypeptides on the gel. Label the positive and negative ends of the gel.Protein A: 40 kDa single polypeptideProtein B: 80 kDa protein, made up of two subunits of molecular weight 20 kDa and 60 kDa, held together by noncovalent interactionsProtein C: 200 kDa protein, made up of four identical subunits (50 kDa each) linked together by disulfide bondsOn an SDS-gel, If the distance traveled by the bromophenol blue dye is 7 cm, and the distance traveled by the protein band is 2.1 cm, the mobility of the protein is 0.3 30 3 30%
- A purified protein fraction has a total sample volume of 360 µL. The sample has a corrected A280 of 0.484, and the blank corrected A280 was 0.052. (Both values were measured with a path length of 1.00 cm.) If 5.00 µL of the sample was used in a reaction, calculate the mass of protein in the reaction (in µg).Using the chart below, can you produce a two-step procedure that demonstrates protein purification in protein D from the other proteins? Would you use a size and/or an ion-exchange chromatography? 1. Sketch two chromatograms that demonstrates this behavior.Help me please