The amino acid histidine has ionizable groups with pK, values of 1.8, 6.0, and 9.2, as shown. COOH COO COO- COO HN-CH H.

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The Amino Acid Histidine Has Ionizable Groups With Pk Values Of 1 8 6 0 And 9 2 As Shown Cooh Coo Coo Coo Hn Ch H 1 (212.57 KiB) Viewed 21 times

The amino acid histidine has ionizable groups with pK, values of 1.8, 6.0, and 9.2, as shown. COOH COO COO- COO HN-CH H.N-CH H2N-CH HN-CH CH, H CH, H CH₂ CH, N 6.0 CH 1.8 pk, CH 9.2 рк, CH ICH W PK, H N N H lonizable – COOH group COO- -HisH+ = -His -NH; --NH, A biochemist makes up 80 mL of a 0.15 M solution of histidine at a pH of 5.3. She then adds 60 mL of 0.10 M HCI. What is the pH of the resulting solution?