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- Draw dipeptide Arg-Thr at pH 6.0. Circle the six atoms that are restricted in one plane. Calculate its approximate pI assuming pKa for NH3+ is 10.0, pKa for COOH is 3.0, PKR for Arg is 12.0Quinine ( C20 H24 N2 O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug. For quinine, pK, = 5.1 and pK, = 9.7 ( pKp = – log Kp). Only 1 g quinine will dissolve in 1920.0 mL of solution. Calculate the pH of a saturated aqueous solution of quinine. Consider only the reaction | Q+ H2O= QH+ + OH- described by pK, where Q = quinine. pH =Draw the amino acid product that results from a transamination reaction involving pyruvate and glutamate, shown in the image below. Draw the product as it would occur at the pH of most body fluids, including all charges. You do not need to draw the other product of the reaction. O NH3 3D CH3-C-C-o-+ 0-CH-CH CH2-C-0--→? pyruvate glutamate Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars. The single bond is active by default. Include all hydrogen atoms and charges. > View Available Hint(s) CONT. H. N. NV CI Br 1] -C- C1 SI
- Psilocybin is a natural product of psychotropic "magic" mushrooms and has the Following structure: HO HO O=0 Psilocybin The pK a Of the first phosphate oxygen is 1.3, the pK. Of the second phosphate oxygen is 6.2, And the pKa Of the tertiary amine is 10.4. What is the average charge of psilocybin when Dissolved in your carbonic acid buffer of pH=6?80mL of a 0.3M solution of hexapeptide Leu-His-Cys-Glu-Asn-Arg is adjusted to pH=pI. The solution is then titrated with 0.2M HCL to a final pH of 2.1. Sketch the titration curve, labelling the pH and volume axes. Indicate the volume of HCL needed to reach relevant pKa value and equivalence point(s)z Relevant pKa values are: 2.1, 4.3, 6.0, 8.3, 9.8, and 12.5.80mL of a 0.3M solution of hexapeptide Leu-His-Cys-Glu-Asn-Arg is adjusted to pH=pl. The solution is then titrated with 0.2M HCI to a final pH of 2.1. Sketch the titration curve, labelling the pH and volume axes. Indicate the volume of HCl needed to reach each relevant pKa value and equivalence point(s). Relevant pka values are: 2.1, 4.3, 6.0, 8.3, 9.8, and 12.5.
- The net charge on the most prevalent form of bisphosphoglycerate in blood is what?Consider the following dipeptides: AC HE TG LR VK How many of the dipeptides in this group that would stick to an anion exchange column at pH-8? Please give me the whole number as the answer, 0, 1, 2 etc Amino Acid pKac pKaN pKaR 9.8 9.9 97 2.4 Glycine Alanine 23 Valios 222Draw two different possible hydrogen-bonding interactions between two molecules of formamide (HCONH2). Clearly label the hydrogen-bond donor and acceptor atoms. Which of these two possible hydrogen-bonding interactions is more likely to occur? (Hint: Consider resonance structures for formamide.)
- Which of the following drugs is a less potent microsomal triglyceride transfer protein (MTP) inhibitor, which reduces cholesterol levels? O Structure 1 (IC50 = 23 nM) O BMS-200150 (IC50 = 2.2 µM) O Hybrid Structure (IC50 = 12 nM) %3! O Hit compound (IC50 = 36 µM) %3D Lomitapide (IC50 = 0.5 nM)A 100 mL solution of 0.1 M glycine at pH 1.72 was titrated with 2 M LIOH. The pH was monitored and the result were plotted as shown in the graph. The key points of the titration are designated as I to V. Identify the key point in the titration corresponding to the pH at which the carboxyl group is half deprotonated. 12 JL30 (V) 9.60 (IV) 8 5.97 pH 6 2.34 CII) 2 (I) 0.5 1.0 1.5 2.0 OH (equivalents) IV O Il and IV NextLefer to the figure showing the molecular structure of dimethylmercury. H–C-Hg C-H H. Exposure of human skin to a single drop of dimethylmercury can lead to death, as it is highly poisonous and passes easily cell membranes. Based on its structure, why is it able to pass so easily through cell membranes? I-0-I IICIH