A protein has an isoelectric point at 6. It is soluble at what pH?
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A protein has an isoelectric point at 6. It is soluble at what pH?
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- Proteins are usually least soluble in water at their isoelectric points. Explain.Shown below is the structure of a polypeptide with the pK, values of its acidic hydrogens. pK = = 10.1 H OH pK, = 9.2 H. pKa = 2.1 H. N-H pK, = 6.0 pKa = 3.9 1. How many peptide bonds are present in one molecule of the polypeptide? [ Select ] II. Over what pH range would this molecule predominantly exist in a state that has a net charge of zero? [ Select ] ZIThe addition of ethanol, CH3CHOH, t an aqueous solution lowers the surface tension of the solution. Predict whether adding ethanol to an aqueous protein solution will tend to stabilize or unfold the protein. Briefly explain.
- The protein gamma globulin has an isoelectric point of 6.60. Suppose you did a pH titration of a solution containing gamma globulin. At what pH will the protein aggregate?What exactly are proteins?What is a protein's building block? What are its chemical properties?How do proteins get denatured structurally? Explain it.What does it mean to have an isoelectric point? What is the significance of it? strictly no plagiarism.the overall, net ionic charge on this peptide at pH = 7 would be: Cys - Ala - Glu-Arg - Met - Ser
- A sample mixture consists of three proteins with the following properties: Protein A MW (kDa) 200 Amino acid composition 40% nonpolar, 60% polar B 45 20% nonpolar, 80% polar C 98 85% nonpolar, 15% polar IpH 9 3 5 1. If the mixture is subjected to ammonium sulfate precipitation, which protein will precipitate out first? [Select] 2. If the mixture is subjected to isoelectric focusing, which protein will stop moving nearest to the positive electrode? [Select] 3. If the mixture is subjected to cation-exchange chromatography using a buffer at pH 7, which protein will bind to the resin? [Select] 4. If the mixture is subjected to SDS-PAGE, which protein will be at the bottommost portion of the gel? [Select] * Previous Nex2. 0.1 mL of a protein solution of concentration of 7 mg/mL was diluted to a total volume of 4.0 mL with water (i.e. 0.1 mL of the solution was added to 3.9 mL of water). 3 mL of this solution was then mixed with 27 mL of water. What is the concentration of the diluted protein solution? Space to show your workings:A protein has a dissociation equilibrium constant equal to 4.0um. What is the concentration of free ligand when the fraction of bound sites is 0.7
- A large chaperone protein complex GroEL is approximately 16 nm in diameter. When it is dissolved in water at 300 K, estimate the average time it will take for GroEL to diffuse a distance of 500 nm (0.5 micron). The viscosity of water is 10-3 Pa*s.Protein solubility in aqueous solutions is independent of ionic strength of the solution. True or FalseMatch lipid descriptions in column A with the phospholipid types in column B. H is attached to the phosphate group bound to C3 of glycerol backbone An amino acid is attached to the phosphate group bound to C3 of glycerol backbone A primary ammonium ion is found in its structure A quaternary ammonium ion is found in its structure A. phosphatidylethanolamine B. glycerophospholipid C. phosphatidylcholine D. phosphatidylserine