Average net charge of +2 predominates: а. b. The predominant species is +H3N-CH-((CH2)3-NH-C-NH2-NH2+)-COO- : Average net charge of arginine is 0: C.
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- The proteins given below are separated using CM cellulose at pH 7.0 Write the order of elution of these proteins from the column Proteins pl Fibrinogen 5.8 Hemoglobin 7.1 Lysozyme 11.0 Pepsin 1.0 Ribonuclease 7.8A mixture of five proteins are analyzed by MALDI-TOF. Their molecular weigths are 3 kD, 22 kD, 100 kD, 225 kD and 515 kD. A peak appears in the mass spectrum at 33.3 kD. Which protein most likely gave this peak?You are analyzing the peptide ala-ile-glu-lys-phe-val- tyr-cys. If you treat the peptide with chymotrypsin, which technique would be best to separate the fragments? O a. ultracentrifugation O b. affinity chromatography O c. dialysis d. gel filtration chromatography O e. ion exchange chromatography What is an advantage of NMR spectroscopy over x-ray crystallography in studying protein structure?
- A vial of Doxorubicin reads 0•5g per vial. Instructions say to reconstitute each 12mg with 2•5ml of NS. How many ml of NS will be needed to reconstitute the vial of the recommended concentration? please show workingG418 disulfate (FW 692.7) is an antibiotic used to select transfected mammalian cells in tissue culture. The standard working concentration for selection is 400 µg/mL of active ingredient in culture medium. The bottle states that it contains 71% active ingredient. You need to make a 100x stock in medium and adjust the pH before you apply it to cells. How much powder should be added to make 10 mL of stock solution? How much do you add to a 2 mL culture dish?A mixture of proteins contains Pepsinogen (35 kDa), Fumarase (49 kDa), Transferrin (80 kDa) and Thyroglobulin (340 kDa). Rank these proteins based on the order of their elution from a gel filtration column (1 being the first one to elute and 4 as the last one). Throglobulin Pepsinogen Fumarase Transferrin
- Which of the following is NOT a unit of concentration? All of these options are units of concentration. mM Moles/Liter Molar You gathered your data from Lab , and found the following values: Total Activity of lysozyme in HEW: 14 units Total Activity of lysozyme in carb 1: 21 units Total amount of protein in HEW: 70 mg Total amount of protein in Carb 1: 15 mg Calculate the extent of purification of lysozyme in Carb 1. A 7 fold B 150% C 15 fold D 70%The A280 of a protein sample loaded onto a gel was determined to be 0.767 (1.00 cm path length, after subtracting the blank). The total volume of this sample was 428 µL. 19.0 µL of this protein sample was mixed with 19.0 µL of 2X laemalli sample buffer and then 12.0 µL of the entire sample was loaded into the gel and electrophoresed. Calculate the amount of protein that was loaded into the gel (in µg).Electrophoresis is performed at PH 6.8 on a mixture of mutated hemoglobin that differ from normal haemoglobin (Hb) only by the substitution of one amino acid- Hb X: Val replaced par Glu - Hb Y: Asp replaced by Leu - Hb Z: Glu replaced by Lys What will be the order of migration between cathode and anode of these mutated Hb compared to normal Hb? Justify your answer.
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