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- 22-91 Which amino acid does not rotate the plane of polarized light?Following are a structural formula and a ball-and-stick model for the artificial sweetener aspartame. Each amino acid has the L configuration. (a) Name the two amino acids in this molecule. (b) Estimate the isoelectric point of aspartame. (c) Draw structural formulas for the products of hydrolysis of aspartame in 1 M HCl.In one of the steps in this pathway fructose 1,6-biphosphate (F1,6BP) is converted to gylceraldehyde-3-phosphate (G-3-p) and dihydroxyacetone phosphate (DHAP). This reaction is catalyzed by the enzyme aldolase. For this reaction at 25 celcuius and Ph7 we have: Keq= 10-4M and Delta G = +5456 cal/mol Calculate the following: The concentration of F1, 6BP, DHAP and G-3-P at equilibrium when the initial F1,6BP is (A) 1M, (b) 10-2 M, (c) 2 X 10*4 M and (d) 10-5 M. I been trying to solve this problem but I dont even know where to begin with. Atleast help me with problem A, I would be able to guide myself through.
- Calculate the isoionic and dielectric pH of 0.01510 M glutamine. pk1=2.19 pk=9.0Draw the structure of the amino acid L-leucine at each pH: (a) 6; (b) 10; (c) 2. Which form predominates at L-leucine's isoelectric point?Which of the following bases are strong enough to deprotonate CH3CH2CH2C≡CH (pKa = 25) so that equilibrium favors the products: NaC ≡ N NaH CF3COONa CH3Li CH3ONa NaNH2
- Repeated laboratory results over the past three weeks suggest that your patient suffers from acidemia. In the most recent visit, blood tests yielded the following results (normal values in parenthesis): pH = 7.34 (7.4) pCO2 = 60 mm Hg (40 mm Hg) [HCO3-] = 31 mM (24 mM) The problem is most likely due to: A) high glucose level in blood B) vomiting and nasogastric suction C) chronic respiratory center depression and central hypoventilation D) diabetic ketoacidosis E) none of the aboveWhere is the effective buffering range for this amino acid in the acidic region?(a) Describe in detail how you will determine the primary structure of protein. (b)You have been given a mixture of lysine, histidine and cysteine. The isoelectric point of the amino acids are as follows:Histidine 7.64Lysine 9.74Cystenie 5.02Show how you will separate the mixture into the pure forms. State and describe any instrument that you will use to separate the components in the mixture.
