Question

All amino acids have two ionizable functional groups: an ?-amino group (average pKa of 9.4) and an ?-carboxylic acid group (average pKa of 2.2). Glutamic acid has an ionizable side chain (R group) with a pKa of about 4.1. One of the possible ionization states of glutamic acid is shown in the image. O || H3N+—CH—C—OH | CH2 | CH2 | C=O | OH At what pH would this structure of glutamic acid be the predominant ionization state? Consider the ionization state of all three of the functional groups. 1.5 The protonated form of the R group of glutamic acid is shown in the structure. The ratio of the protonated form to the charged (deprotonated) form depends on the pKa of the R group and the pH of the solution. Select the pH values at which the charged form of the R group would predominate. 7.0 3.0 11.9 4.1

          All amino acids have two ionizable functional groups: an ?-amino group (average pKa of 9.4) and an ?-carboxylic acid group (average pKa of 2.2). Glutamic acid has an ionizable side chain (R group) with a pKa of about 4.1. One of the possible ionization states of glutamic acid is shown in the image.

O
||
H3N+—CH—C—OH
|
CH2
|
CH2
|
C=O
|
OH

At what pH would this structure of glutamic acid be the predominant ionization state? Consider the ionization state of all three of the functional groups.

1.5

The protonated form of the R group of glutamic acid is shown in the structure. The ratio of the protonated form to the charged (deprotonated) form depends on the pKa of the R group and the pH of the solution.

Select the pH values at which the charged form of the R group would predominate.

7.0
3.0
11.9
4.1

All amino acids have two ionizable functional groups: an ?-amino group (average pKa of 9.4) and an ?-carboxylic acid group (average pKa of 2.2). Glutamic acid has an ionizable side chain (R group) with a pKa of about 4.1. One of the possible ionization states of glutamic acid is shown in the image.

O
||
H3N+—CH—C—OH
|
CH2
|
CH2
|
C=O
|
OH

At what pH would this structure of glutamic acid be the predominant ionization state? Consider the ionization state of all three of the functional groups.

1.5

The protonated form of the R group of glutamic acid is shown in the structure. The ratio of the protonated form to the charged (deprotonated) form depends on the pKa of the R group and the pH of the solution.

Select the pH values at which the charged form of the R group would predominate.

7.0
3.0
11.9
4.1

Added by Jason M.

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