Question 1] a) A naturally occurring amino acid, 1a, has the following structure: i) ii) ii) i) ii) iii) What is the mol

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Question 1 A A Naturally Occurring Amino Acid 1a Has The Following Structure I Ii Ii I Ii Iii What Is The Mol 1 (36.92 KiB) Viewed 14 times

Question 1] a) A naturally occurring amino acid, 1a, has the following structure: i) ii) ii) i) ii) iii) What is the molecular formula of la? What three functional groups does la contain? Draw tetrahedral representations of both R and Senantiomers of 1a. b) The effect of pH on the form of 1a in aqueous solution is shown on the Fraction of species 1.0 23333333333 09 07 DSC 60 06 04 0.3 02 0.1 H₂N 00 00 OH You [2] OH 20 40 graph below: 1.0 622282EREE 1) Give the name of the dipeptide. Give the one and three-letter sequence for the dipeptide iii) Draw the structure of the dipeptide. ii) 03 06 04 00 02 -04 --06 300 120 140 --08 -10 The red line shows the average total charge on each molecule in solution (right axis). while the green, blue and yellow lines show the fraction of each of three differently ignized forms of 1a (left axis). For each of the three forms, draw the structure and give the formal charge. From the graph, estimate the isoelectric point, pl, of 1a, and explain how you arrived at your result. Estimate the pk, of the carboxylic acid group (-COOH) and ammonium group (-NH,') in 1a and explain how you arrived at your result. Total Charge c) For both of the TWO dipeptides that can result from the reaction between vitterions of 1a and alanine: ||