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The flipping of Phe rings requires that groups surrounding the ring move aside momentarily. The rate of ring flipping can be measured using NMR. You are studying two mutant versions of a protein. In both of the mutants, the proteins have considerable secondary structure, based on circular dichroism studies, and bind the hydrophobic dye ANS, indicating the formation of the hydrophobic core of the protein. However, in one of the mutants (mutant A), the rate of Phe ring flipping is much higher than in the other (mutant B). A researcher suggests that one of these mutants completes the folding process to form a misfolded protein, much like a prion, whereas the other is stuck at some point on the folding pathway.
A. Which mutant forms a misfolded structure? Explain your reasoning.
B. Where along the folding pathway is the other mutant stuck? Again, explain your reasoning.
Calculate delta G for ATP hydrolysis when the concentration of ATP, ADP, Pi are all equal to 1mM. What is delta G when the concentration of ATP, ADP, and Pi when the concentration of ATP, ADP, and Pi are all equal to 2M?
The external environment is open directly to the peritoneal cavity of the abdomen and pelvis. This is one source of pelvic inflammatory disease.
ssume you have just eaten a sausage and egg sandwich for breakfast. Explain the chemical changes that occur in the sandwich as it passes through the parts of the GI tract.
What is the significance of the chloroplasts structural feature that the thylakoid membrane is located between the stroma and the thyloakoid space.
List the different hypothalamic regions and peripheral signals involved in the control of feeding and satiety.
The main of eukaryotic cells are on the order of 10-100 micrometers in diameter. Bacterial cells are smaller, typically in 1-10 micrometers.
Dozens of potato varieties exist, differing from each other in potato-tuber size, skin colour, flesh colour, and shape. One might construct a classification of potatoes based on these morphological traits. Which of these criticisms of such a classifi..
What strategies do other organisms have that allow them to live in environments that are hypertonic to their cytoplasm. What is the pattern in data from Seeley's field experiment.
Phosphonylation, a chemical surface treatment, has been proposed as a means of increasing the hydrophilicity of LDPE, and therefore increase its lubricity and reduce vascular tissue damage.
Our digestive and urinary systems process our food and body waste to remain our bodies nourished and functioning. Poor diet and hygiene can compromise our digestive and urinary systems,
Use the momentum balance method and derive the flow rate of a Newtonian fluid flowing across a cylindrical tube driven under pressure of rate change if the tube diameter decreases by half?
Determine which of the following is most likely to be the population in a psychological research study and Which of the following is NOT an empirical question?
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