a. Determine the isoelectric point (pl) for this amino acid. b. Indicate where the amino acid is fully protonated. (Molecule A, B, C, or D?) c. Indicate which molecule that has a net charge of -1. (Molecule A, B, C, or D?) d. Does this amino acid have an R group that functions as and acid or base? 10 141 12 8 pH 6 4 A. COOH PK1 2 H₂N-CH TTT CH₂ COOH pK1 2 B. çoo H3N-CH CH₂ COOH OK2 4 C. çoo H3N CH CH2 COO™ PK3 pk3 9.5 D. Coo H₂N-CH CH2 COO™

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Chapter1: Chemical Foundations
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a. Determine the isoelectric point (pl) for this amino acid.
b. Indicate where the amino acid is fully protonated. (Molecule A, B, C, or D?)
c. Indicate which molecule that has a net charge of -1. (Molecule A, B, C, or D?)
d. Does this amino acid have an R group that functions as and acid or base?
10
141
12
8
pH 6
4
2
A. COOH PK1
H₂N-CH
TTT
0
CH₂
COOH
pK1
2
0.5
B. çoo
H3N-CH
T
1
CH₂
COOH
OK2
4
1.5
C. çoo
H3N CH
CH2
COO™
2
pk3
pk3
9.5
2.5
D. Coo
H₂N-CH
CH2
3
COO™
Transcribed Image Text:a. Determine the isoelectric point (pl) for this amino acid. b. Indicate where the amino acid is fully protonated. (Molecule A, B, C, or D?) c. Indicate which molecule that has a net charge of -1. (Molecule A, B, C, or D?) d. Does this amino acid have an R group that functions as and acid or base? 10 141 12 8 pH 6 4 2 A. COOH PK1 H₂N-CH TTT 0 CH₂ COOH pK1 2 0.5 B. çoo H3N-CH T 1 CH₂ COOH OK2 4 1.5 C. çoo H3N CH CH2 COO™ 2 pk3 pk3 9.5 2.5 D. Coo H₂N-CH CH2 3 COO™
14
12
10
8
pH 6
4
2
0
A. COOH
H₂N+CH
CH₂
COOH
pK1
↓
2
U
pk1
0.5
B. çoo
H3N CH
CH₂
COOH
1
pK2
pK2
C. çoo
H₂Nt CH
CH₂
COO™
pk3
pk3
+
9.5
1.5
2
2.5
Equivalents of OH
D. Coo
H₂N-CH
CH₂
COO
3
Transcribed Image Text:14 12 10 8 pH 6 4 2 0 A. COOH H₂N+CH CH₂ COOH pK1 ↓ 2 U pk1 0.5 B. çoo H3N CH CH₂ COOH 1 pK2 pK2 C. çoo H₂Nt CH CH₂ COO™ pk3 pk3 + 9.5 1.5 2 2.5 Equivalents of OH D. Coo H₂N-CH CH₂ COO 3
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