QuestionWhat is the $\mathrm{pH}$ at which histidine's $\mathrm{R}$ group is mainly ionized if its $\mathrm{pKa}$ is 6.0? Options: 4, 6, 7, 8.

Studdy Solution
Given that the pKa of the R group of histidine is.0, the pH at which the R group is mostly ionized must be greater than.0.
Therefore, the pH at which the R group of histidine is mostly ionized is7.