You want to study the proximity of two residues in clamp region of a protein. Draw a schematic of your protein and label two locations of your fluorophores. Explain how your fret fluorophores would determine if these two residues were close to one another
if two proteins are in close
proximity then the chromophores attached with one protein which is
donor if become excited ,it will emit the signal at emission
wavelength and the emission frequency is the excitaction frequency
of acceptor chromophore and then after excitation the donor
chromophore will emit the signal at its emission wavelength but
which is different from donor chromophore emission wavelength.
Now if two proteins are distantly placed then the do or molecules will not be excited and then you will only get the emission at the emission wavelength of donor chromophore.
Thank you
You want to study the proximity of two residues in clamp region of a protein. Draw...
1. You want to immunolabel a low abundance expressed transmembrane receptor in the plasma membrane in epithelial cells. Describe the process you would do to label by immune-labeling with fluorescence this protein? Be specific in your answer 3 pts 2. Based on your knowledge of fluorophores and reading of the spectra of dyes, answer this question. You immunolabeled two proteins found close together in muscle fiber sarcomeres by immunofluorescence and a toxin conjugated fluorophore. You need to next show the...
You are studying the HIV Protease protein and you want to isolate it for study. Describe the steps that you would take to express the protein in bacteria and purify it for future study. Describe one other technique concerning protein analysis and what that technique would tell you about the protein.
1. You are working in a lab as a Bio 199 student. Your professor asks you to use a microscope to observe the interaction between two proteins. Which of the following techniques are appropriate? A. FRAP, Fluorescence recovery after photobleaching B. FRET, Fluorescence resonance energy transfer C. Proximity ligation analysis D. FRET and proximity ligation analysis E. All of the answers are correct 2. Which two organelles appear most similar when viewed under an electron microscope? A. nucleus and lysosome...
You want to make E. coli bacteria that glow green. Your plan is to insert the gene for green fluorescent protein (GFP) from a jellyfish (a eukaryote) into the genome of the bacteria so that the mRNA is transcribed by the E. coli cells and translated into protein. What changes do you need to make to the jellyfish GFP gene sequence to make sure that the bacteria will make a functional protein? Why? (1 point) A type of amatoxin binds...
Based on your knowledge of fluorophores and reading of the spectra of dyes, answer this question. You immunolabel two types of proteins found close to each other like in muscle fiber sarcomeres, but now need to show them together as distinct labeled proteins using fluorescence microscopy. From the list of fluorophores below, choose the best two fluorescent tags to use in combination for fluorescence microscopy (circle your two choices). Note, there are several examples to choose from to answer this...
A. You want to make a translational fusion of protein Z and the yellow fluorescent protein YFP (Z-YFP) so that expression of the fusion occurs with the same cell-specific pattern as that of protein Z. The protein Z gene has a 2 kb promoter, two 1 kb exons, and one 5 kb intron. The YFP gene is 0.7 kb. Outline with words and sketches your strategy to make the Z-YFP fusion clone using PCR. You already have cells that contain...
Imagine you want to study one of the human crystallins, proteins present in the lens of the eye. To obtain sufficient amount of the protein of interest, you decide to clone the gene that codes for it. Assume you know the sequence of this gene. How would you go about this? In a paragraph of approximately 3 to 5 complete logical sentences, explain the technique that you would use, why, and its basic steps. To answer this question you need...
Multi-part question according to lab textbook: A student is analyzing crude cellular extract for protein content. Crude cellular extract is simply the cellular contents obtained by lysing (breaking open) cells. Which method (A280 or biuret) would be the most appropriate method for determining protein concentration and why? A student has purified a blood protein with an extinction coefficient of 1.86 (mg cm/mL^-1) which the student compares to another blood protein which has an extinction coefficient of 0.72 (mg cm/mL^-1). Which...
You are interested in the mobility of two different unknown integral plasma membrane proteins—protein X and protein Y—in a cell. In one cell, you fluorescently label all the X proteins. In another cell, you label all the Y proteins. When you perform FRAP analysis on both cells, you find that most of the protein X fluorescence has recovered within 3 minutes, but recovery of the protein Y fluorescence is significantly slower. Even after 10 minutes, only 50% of the protein...
28 You want to study the biochemical properties of the respiratory enzyme complexes required for oxidative phosphorylation. Your initial goal is to measure proton pumping by the NADH dehydrogenase complex. You mix purified NADH dehydrogenase complex with phospholipids and a pH indicator dye that changes color at acidic pH, and you follow a protocol for making liposomes. After verifying that the protein complex was incorporated into liposomes, you add NADH and incubate at 37°C. You are dismayed to observe no...