17. As shown below, the amino acid histidine can exist in 4 different protonation states depending on the pH of its environment. a) Which numbered state will histidine exist as at pH 1? pH 11? Neutral pH? b) Which numbered state of histidine could be called a "zwitterion"? =NⓇ HN. 1 OH pka = 3 HN- H 2 pka = 6 HN H³NⓇ 3 pka = 10 HN- H₂N

17. As shown below, the amino acid histidine can exist in 4 different protonation states depending on the pH of its environment. a) Which numbered state will histidine exist as at pH 1? pH 11? Neutral pH? b) Which numbered state of histidine could be called a "zwitterion"? =NⓇ HN. 1 OH pka = 3 HN- H 2 pka = 6 HN H³NⓇ 3 pka = 10 HN- H₂N

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter24: Biochemistry

Section24.1: Proteins

Problem 2RC

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