Assessment $-$ Biochemistry $1.$

s Readin...

C giv

Resources

All amino acids have two ionizable functional groups: an $-$amino group $($average $p{K}_a$ of $9\mathrm{.}4)$ and an $-$carboxylic acid group states of aspartic acid is shown in the image.

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

The protonated form of the $R$ group of aspartic acid is shown in the structure. The ratio of the protonated form to the charged $($deprotonated$)$ form depends on the $p{K}_a$ of the $R$ group and the $pH$ of the solution.

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

$7\mathrm{.}0$

$2\mathrm{.}5$

$12\mathrm{.}2$

$20$

Search