A spherical cell with the diameter of 10uMhas a protein concentration of 20 mg/ml. Determine the number of protein molecules within the cell if the molecular weight of an average protein is 50,000 daltons (g/mol). Recall that Avogadro's number is NA 6.0221367×1023 molecules/mol. =

Polymer beads (resin) made of DEAE (diethylaminoethyl) cellulose are packed in an ion exchange column. The total mass of beads in the column is 8.47 kg. On average, each bead weighs 0.0023 g and has an average of 18.4 * 10° positively charged amine groups that can adsorba negatively charged protein that passes through the column. A solution containing 2.07 mg/L of a protein is maintained at pH 6.3 and is passed through the ion exchange column at 0.215 L/min. The protein has a molecular weight of 154,000. The pk, of the amino groups on DEAE cellulose is 7.1, and the pl of the protein is 5.6. 2. A. How long can the column be operated before reaching 80% capacity (i.e., 80% of the amino groups on DEAE are bound to the protein through an ionic bond)? You may assume that one protein attaches to one + charge on the beads (although it's possible that proteins attach to more than one + charge). B. After reaching 80% capacity, explain what you would do to release the protein attached to the…

6-73 In each case, tell which side (if either) rises and why. The solvent is water. A A Osmotic membrane (a) 1% glucose (b) 0.1 M glucose (c) 1 M NaCl (d) 1 M NaCl (e) 3% NaCl (f) 1 M NaBr (B) B 5% glucose 0.5 M glucose 1 M glucose 1 M K₂SO4 3% KC1 1 M KC1

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).

Give only typing answer with explanation and conclusion  You want to make 94 µL of the diluted Cell-Free extract for estimation of total protein. To do this, how much water will you add to the correct volume of the undiluted cell-free extract?   Note: Cell-free extracts will need to be diluted 1:25 in water.

Using the equation for the best-fit straight line through your data, the average absorbance of your unknown samples U1 and U2, and any dilution factors (DON’T LEAVE OUT THE DILUTION FACTOR), calculate the concentration of protein in the original unknown protein sample. y = 1.6849x + 0.0414R² = 0.9904

Does this calculation look correct? My goal isto have a target mass of 10 µg of my protein with a total volume of 30 µl. Protein was measured and found to have a concentration of at 308.35 µg/ml Recall, mass = concentration * volume 10 µg = 308.35 µg/ml * V V = 0.01 mg/ 0.30835 mg/mL = 0.032430679 mL = 32.43067942 µL Note: cannot measure this amount; two dilutions required. Dilute by 1/40: measure 2.5 µl of protein at 0.30835 µg/µl and add it to 97.5 diluent to prepare a solution of protein at 7.71 mg/ml. This diluted sample will be used further. Mass = concentration * volume 10 µg = 7.71 mg/ml * V V = 0.01 mg/ 7.71 mg/ml = 1.3 µL Therefore, will measure 1.3 µl of protein at 7.71 mg/ml and add it to 28.7 µl of diluent.

You are given a pure protein sample to characterize and provided the following information: Its molar extinction coefficient, ε280, is 0.25 liters micromole-1 cm-1 in both the folded and unfolded form            Its ΔGo for unfolding is 1.5 kcal/mol at 37o  (where RT = 0.59 kcal/mole) A) Using a 0.5 cm pathlength cell, you measure the absorbance at 280 nm of a 20-fold dilution of your pure protein in solution (by this, we mean that 50 ul of the protein sample was diluted to a final volume of 1 ml) and find A280 = 0.40. What is the original concentration of the protein before dilution? B) What is the concentration of the unfolded form of the protein in your sample?

Compute for the albumin to globulin (A/G) ratio using these data given Albumin= 51.9g/L Total protein = 75.5 g/L Note: answer should be in ratio form

Molar concentration 1.0 Molar concentration Depicted below is a cell membrane separating two closed compartments, each filled with one liter of H₂. You add one mole of each of the molecules as shown below. The molecule to which the membrane is most permeable diffuses across at a net rate of 0.5 moles/hour. Based on this information, answer the following questions. 1.0 0₂ Nat 0.5- fructose glycerol K+ 2. Graph the expected relative concentrations of each solute in the right hand compartment as a function of time. 1 Time in hours Nat 1. Immediately after adding these solutes, will there be a net movement of H₂O molecules across the membrane in one direction? If so, in which direction and why? through right K+ 3. Finally, you add ATP to the left side compartment at the time indicated by the arrow below, and measure concentration of Nat and K+ in the right side compartment. Your results are graphed below. Propose a hypothesis to explain the results you obtained in this experiment. 2 (10…