Ligand binding and response. The following question involves the ligand binding to a receptor and the receptor's response to that ligand. What ligand concentration would be required for a full agonist with a KD of 8 nM to achieve a response of 0.75?
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- Etiology? What does that mean? What does the fact that rotenone appears to increase the susceptibility to Parkinson disease indicate about the etiology of Parkinson disease?MULTIPLE CHOICE In patients with Lesch Nyhan Syndrome, purine nucleotides are overproduced and over excreted. The hypoxanthine analogue Allopurinol, which effectively treats gout , has no effect on the severe neurological symptoms of Lesch- Nyhan patients because it does not A. decrease de novo pyrimidine synthesis B. decrease de novo purine synthesis C. decrease urate synthesis D. increase PRPP levels (Phosphoribosyl pyrophosphate)Need help. Plz explain briefly Describe in detail with the aid of diagrams the use of chemical shift perturbation mapping to identify ligand binding sites on a protein.
- resting state of the protein, the Lys 216 Schiff base has pKa = 9.5 and Asp 85 has pKa = 3.5. When the conformational change occurs, the proton that was on the Schiff base moves to Asp 85. This should tell you that one or both of these two pKas changed with the conformational change. How does the pKa of Asp 85 compare with the pKa of the Lys 216 Schiff base after the conformational change?Activity: Write the line structure of each of the following peptide at pH7 and identify how many peptide bond in each number. 1. Glycyl-valyl-serine 2. Threonyl-cysteine 3. Isoleucyl-methionyl-aspartate4. a. Calculate the KM (Michaelis constant) and the vmax (the maximum initial rate) for both substrates (sphingosine and ATP). Show your work, and be careful about units. b. threo-dihydrosphingosine, a stereoisomer of sphingosine, is an inhibitor of sphingosine kinase. What kind of inhibitor (competitive, uncompetitive, noncompetitive) is threo-dihydrosphingosine? Citing information from the Lineweaver-Burke plots, explain how you can tell.
- Activity: Write the line structure of each of the following peptide at pH7 and identify how many peptide bond in each number. 1 Alanyl-phenylalanine 2. Lysyl-alanine 3.Phenylalanyl-tyrosyl-leucineDisadvantages of cholesterolAre these correct? And what category would the last reaction belong to and why? Thank you!
- Cone snails are carnivores that inject a powerful set of toxins into their prey, leading to rapid paralysis. Many of these toxins are found to bind to specific ion-channel proteins. Why are such molecules so toxic? How might such toxins be useful for biochemical studies?multiple choice, choose the correct answer Under which of the following conditions would an enzyme fail to be accurately described by the M-M equation:1. kcat >> k1 or k-12. In the presence of a negative allosteric effector3. At low concentrations, the reaction is first order with respect to substrate concentration4. At high concentrations the reaction is zero order with respect to substraterole of iron (Fe) in human body by focusing on Structure-Function-Location• how much of FE is present in your body? • what does it do? • where is it found? how long can you survive these conditions, before you will manifest first signs of physiological/psychological (either one, maybe both?) pathology? What will be those symptoms? Can you tell what is the natural cycle of Fe in your body?