A figure expressing the acidity or alkalinity of a solution of a weak electrolyte in a similar way to pH, equal to −log₁₀K, where K is the dissociation (or ionization) constant of the electrolyte.
- ‘With SCCE 40% of the pKs are in error by this amount and 7% have errors greater than 4 pH units.’
- ‘In the yeast variant, the apparent pK of the alkaline transition is an intermediate value between the pKs of two ionizations.’
- ‘The pKs were calculated using a modified Tanford-Kirkwood pK algorithm.’
- ‘The average experimental residue pKs are slightly stabilized relative to what is found in small peptides with a modest standard deviation.’
- ‘In addition, several residues take heavy atom conformations different from that found in the protein data file at some point in the pH titration, and these have significant impact on calculated pKs.’
From p as in pH, and K representing a constant.
We take a look at several popular, though confusing, punctuation marks.