Zachary e Chegg Study I Guided Sol x y M Quinnipiac University-CHI × New Tab ->

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Zachary e Chegg Study I Guided Sol x y M Quinnipiac University-CHI × New Tab -> C D www.saplinglearning.com/ibiscms/mod/.bis/view.php?id=2500091 :: Apps Bookmarks Go lab # 1 -Breakover-Jay-Z M McGraw-Hill Connec ogle Calendar - V D Tickets » Boston Ca Your 2014 Opening Programmed Cell De Other Bookmarks Sapling Learning Jump to.. Logout @ Help Sapling Learning Quinnipiac University-CHE 315-Spring16-CARRASCO Activities and Due Dates HW 2: Amino Acid Properties My Assignment Resources 2/15/2016 11:55 PM7/10 2/14/2016 01:01 PM Assignment Information Available From Not Set Due Date: Late submissions: Allowed with 25% of the Gradebook Attempts Score Calculator Periadic Table 100 Question 9 of 15 2/15/2016 11:55 PM 100 Mapoob sapling learning points possible deducted per day until 02/19/2016 11:55 PM 100 Give the pKa values for the protonatable groups of proline, and then calculate its pl (Answers within ± 0.3 pH units will be accepted) 80 Points Possible: 98 Number Grade Category: Homework 100 Description: This homework assignment should reinforce the chapter on amino acids properties. Notice that Tyr is assigned as a polar amino acid because of the hydroxyl group in the benzene ring Policies: (COOH) 100 Number 100 H2N Number (NH2') Homework 10% deduction The pl of proline You can check your answers. 67 You can view solutions when you complete or give up on any question. 100 You can keep trying to answer each question until you get it right or give up 12 100 13 You lose 10% of the points available to each answer in your question for each incorrect attempt at that answer Previous Give Up & View Solution O Check Answer Next Exit Hint 15 Help With This Topic Copyright © 2011-2016 Sapling Learning, Inc.-148 about uscareersptprivacy policy terms of usecontact us help

Explanation / Answer

For proline

pKa value of carboxyl group (COOH) is (pKa1) = 1.99

and

pKa value of amino group (NH2) is (pKa2) = 10.96

now

we know that

isoelectric point is given by

pI = (pKa1 + pKa2) / 2

so

pI = ( 1.99 + 10.96) / 2

pI = 6.475

so

the pI value is 6.475

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