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- Provide a diagram of the EPH RECEPTOR B2 (EPHB2) structure. Give bioinformatics structure72. Explain the basics of the interactions between ligands (chemical messengers) and their receptors. Explain the three factors that influence the magnitude of a target cell's response to ligand binding.Please ASAP. Thank you. Hyperpolarization activated cyclic nucleotide modulated channels (HCN). How is this channel activated? What is predominant ion that flows through this channel?
- a. b. C. Sphingosine-1-phosphate (SPP) has recently been discovered to be important for cell survival. The synthesis of SPP form sphingosine and ATP is catalyzed by the enzyme sphingosine kinase. An understanding of the kinetics of the sphingosine kinase reaction may be important in the development of drugs to treat cancer. The velocity of the sphingosine kinase reaction was measured in the presence (5 µM) and absence of threo-sphingosine, a stereoisomer of sphingosine. The results are shown below. The sphingosine kinase used in all the reactions was 10 mg. Sphingosine (uM) 2.5 3.5 5 10 20 50 vo (mg. min-¹) (no inhibitor) 32.3 40 50.8 72 87.7 115.4 What are the KM and V MAX in the presence and absence of the inhibitor? What kind of an inhibitor is threo-sphingosine? What is the K₁ value? What is the Keat (turn over number)? vo (mg. min-¹) (with threo-sphingosine) 7.6 10.5 14.6 25.4 43.9 70.86. For a 1:1 ligand-receptor binding interaction that is modeled by X + Y XY : (A) Show how the fraction of ligand-receptor binding (fo) is represented by the [X] [X]+ K, equation of f, (i.e., derive this expression for this reaction beginning eg with the relationship for K = f([X].[X],[XY]) under equilibrium conditions). (B) shown to the right for this reaction, what is the estimated value of Keg? Give your answer in units of M. For the data plot 0.9 0.8 0.7 0.6 문 0.5 0.4 0.3 0.2 0.1 0.0000 0.0050 0.0100 0.0150 0.0200 0.0250 0.0300 0.0350 0.0400 [X) (mM)98.Describe the mechanism for fast ligand-gated channels and the types of changes they can produce in the cell membrane.
- + Predict the effects of the following on the flux through the listed pathways. Mark whether the rate of each will increase (+), decrease (-), or remain the same (0). If liver and muscle do not have the same pattern, indicate both in the box and mark them with L (liver) or M (muscle). Alteration Flux through Example: organism is dead Glucagon is released in the body F-2,6-BP levels are high A large amount of sugar is eaten A fight or flight response occurs (epinephrine is released) NADPH levels are low and glucose levels are high glycolytic pathway Flux through Krebs cycle Flux Flux through through Gluconeogenesis PPP Flux through Glycogenesis= 20 nM. The rate of receptor-ligand complex formation with an A receptor-ligand complex has a dissociation constant of Ka added ligand concentration of 10 µM is 5 × 10³ s¯¹. What is the value of the reverse rate constant, k_₁ ? k_₁ = 8-1If intracellular [ATP] = 5 mM, [ADP] = 0.5 mM, and [Pi] = 1.0 mM, calculate the concentration of AMP at pH 7 and 25°C under the condition that the adenylate kinase reaction is at equilibrium.
- Please ASAP. Thanku. Please provide a brief explaination. Qs 2 What will increase the length constant of axons?1B. please help me in detail. Draw a graph of free energy G (y-axis) vs reaction progress (x-axis) that illustrates what the kinase is doing in terms of the free energy by showing (i) the substrate (also label what the substrate is [it’s name]), (ii) the products (also give the name of the products), (iii) draw and label the uncatalyzed and catalyzed reactions, and be sure that the parts of the graph are properly labeled..Q-Slide #6 Add icons to show what CaMKII does to its substrate proteins Ме СР2 Ca** CP2 Me Glu СВР HAT NMDA-R* CREB Ca** Ca* Ca CAMKII* CAMKII ? The state of the cell shortly after glutamic acid bound its receptor
