1. Draw the predominant forms of glutamic acid with increasing pH. The pKas for the ionizable groups are amino terminus = 9.67, carboxy terminus = 2.19, and side chain carboxylic acid = 4.25. C D A Charge: Charge: Charge Charge Lowest pH Highest pH
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- 1. a. Explain why the melting point of palmitic acid (16 carbons, no double bonds) is slightly lower thanthat of stearic acid (18 carbons, no double bonds). Explain why the melting point of oleic acid (18carbons, one double bond) is lower than that of stearic acid b. A mixture of lipids containing phosphatidic acid, cholesterol, testosterone, phosphatidylserine, andphosphatidylethanolamine was applied to a hydrophobic interaction chromatography column. Thecolumn was washed with a high salt buffer, and the lipids were then eluted with decreasing saltconcentrations. In what order would the lipids be eluted from the column? Explain your answer.1. Suppose you decreased the pH of the hypoxanthine solution from 7.0 to 5.0 - what would happen to the ionizable group on a molecule of hypoxanthine?In a 0.1000 M acetic acid solution at 25 degrees celsius , the acid ionizes to the extent of about 1.34 %. Since each molecule of acetic acid which ionizes produces 1 H+ ion and 1 C2H3O2- ion, the concentration in the solution are: HC2H3O2 < -----------> H+ + C2H3O2-
- You have a mixture of 4 amino acids (Q, W, E, R, T) that you want to separate using ion exchange chromatography. Which of these amino acids would bind most strongly to a DEAE anion exchange column at pH 7? Q W E R Tlooking at ABG's, if ph is normal, Bicarb is alkaline, and paCO2 is acidic...what do you say about it? its not clearly in any of the 4 states, partially compensated, etc pH 7.37 HCO3 45 PaCO2 66.1. Draw the peptide chain (indicate if it is solid or hatched wedges) for the following and compute for the isoelectric point. Show solution. Glycine-(L)-Arginine-(D)-Proline-(L)-Glutamic Acid
- The isoelectric point (pI) of glutamic acid is pH 3.08. Draw the structure of the major form of glutamic acid at pH values of: a. 1.00 b. 3.08 c. 11.00.1.Draw the structure of Glycine at the following pH values: 5.97The much-abused drug cocaine is an alkaloid. Alkaloids are noted for their bitter taste, an indication of their basic properties. Cocaine, C17H21O4N, is soluble in water to the extent of 0.17g/100mL solution, and a saturated solution has a pH = 10.08. What is the value of Kb for cocaine?
- 3. What is the significance of the levelling off in the titration curves in terms of the buffering action of amino acids?1. A woman who had been vomiting for 3 days was taken to the emergency department at University of Chicago by her family. The following blood measurements were obtained: pH = 7.6; PCO2 = 48 mmHg; and HCO3- = 37 mEq/L. A) Name the acid-base disorder you suspect that she has? And explain why you have selected this acid- base disorder. B) Provide a physiologic explanation for Gastrointestinal, Respiratory, and Renal changes that are taking place to either cause or compensate for the acid-base disorder.1. Draw the structure of a cholesterol ester where cholesterol is esterified with palmitic acid. is this polar or nonpolar acid 2. Draw the strucutre of lecithin containing stearic acid on carbon 1 and arachidonic acid on carbon 2 of glycerol. is this polar or nonpolar acid 3.Disccuss the medical sginificance of cholesterol , cholesterol ester,l ecithin and choline . 4. Give examples of phosphoglycerides and sphingolipids of biological importance .