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- Time point (min) Absorbance of culture at 660nm Approximate cell concentration Approximate # cells in 1mL extract 0 0.298 1.49 x 108 cells/mL 1.49 x 108 cells 10 0.316 1.58 x 108 cells/mL 1.58 x 108 cells 20 0.374 1.87 x 108 cells/mL 1.87 x 108 cells 30 0.429 2.145 x 108 cells/mL 2.145 x 108 cells 40 0.512 2.56 x 108 cells/mL 2.56 x 108 cells 50 0.544 2.72 x 108 cells/mL 2.72 x 108 cells 60 0.607 3.035 x 108 cells/mL 3.035 x 108 cells a. Using these data, prepare a growth curve of this strain ofEscherichia coli (E. coli).b. Estimate the doubling time for this strain of E. Coli. Clearly showhow you estimated this value from the empirical data presented.ODA stesa smal 3. What volume of a 2.5x10-³ M stock solution is required to produce 50.00 mL of a dilute solution that is 1.0x10-³ M? 10:noitos2/1otontant ds.I HIVA Experiment 8 emotiona zobas dgi inominoqx3 unit2000D.3 Loading Samples and Running the Gel Use special gel loading tips or a micro-syringe to load the complete sample in a narrow well. Take care not to poke the well bottom with the tip as this will create a distorted band. Never overfill wells. This could lead to poor data if samples spill into adjacent wells, and poorly resolved bands. Load 20-40 μg total protein per mini-gel well. Q10. If you have a lysate with protein concentration of 1500 ug/mL, how much sample you need to load according to the step indicated in D.3? Q8. For leptin, what gel percentage are you going to prepare? Q.11. Give at least two common loading control used in Western Blotting?
- 4) You are interested in the total bacterial load of the bat guano. In order to determine this, you go back to your original broth culture and prepare a dilution series. You then spread 100 ml of each dilution onto 3 separate plates. You obtain the following results: Plate 1, 10 -1 dilution: 362 colonies Plate 2, 10 -3 dilution: 76 colonies Plate 3, 10 -5 dilution: 8 colonies. Based on your results, calculate the CFUs/ml in your original broth culture. show your workGeneral Electrophoresis Questions: 1. Compare and contrast the sample buffers for DNA and protein electrophoresis. 2. Compare and contrast the running buffers for DNA and protein electrophoresis.Dilution Experiment Test tube Starch concentration (/mL) Dilution factor Observation 1 500 1:10 Dark blue 2 50 1:100 Light blue 3 5 1:1000 Light purple 4 0.5 1:10000 Yellow 5 0.05 1:100000 Light yellow Observation: 1 has the highest concentration of starch and the following sample which are test tube 2, 3, 4 and 5 have lighter in colour which are light blue, purple, yellow and light yellow in colour respectively. Question: Discuss about the dilution experiment. Explain about the change in colour, the structure of the starch and relate to iodine. Calculation below (starch concentration).
- Dilution Experiment Test tube Starch concentration (/mL) Dilution factor Observation 1 500 1:10 Dark blue 2 50 1:100 Light blue 3 5 1:1000 Light purple 4 0.5 1:10000 Yellow 5 0.05 1:100000 Light yellow Observation: 1 has the highest concentration of starch and the following sample which are test tube 2, 3, 4 and 5 have lighter in colour which are light blue, purple, yellow and light yellow in colour respectively. Question: Discuss about the dilution experiment. Explain about the change in colour, the structure of the starch. Explain about iodine also. Calculation below (starch concentration).Samples: - 1 & 5: Standard proteins (Ladder) - 2 &6: Uncut - 3 & 7: 5 mins - 4 & 8: 30 mins Human and Bovine (Left) Chicken and Pigeon (Right) What do you expect in the lane for #1 tubes? Explain the reason for your expectation. Do the results match the expectations? Do you observe differences in the lanes for tubes 2 and 3? What does that tell you? Are there differences among the species? What does that tell you about how closely related the proteins are from these species? Do the results match the prediction and support the hypothesis? How would your results have been different if an enzyme with a different amino acid sequence preference had been used?In SDS PAGE the resolving gel : is 4%(w/v) acrylamide,PH )6.8 is 6-20% (w/v) acrylamide is 4%(w/v) acrylamide
- Total Protein Determination Spectroscopy Values CREATE CALIBRATION CURVE? DRAWN CONCENTRATION AND ABSORPTION CURVEWhat's the amount of protein if the measurement at A280 = 1.120, dilution factor is 100 and total volume of extract is 45DILUTION COLONY COUNT CFU/mL 1:106 155000 1:107 15500 1:108 1550 1:109 155 Given these values how would I fill in the rest of this serial dilution table? Also, what would be a 1:1 CFU/mL value based on this table?