In previous studies, we demonstrated that the Na+-selective NaChBac (TLESWASG) filter could be converted into one that prefers the divalents Ba2+ and Ca2+ by introducing acidic residues into three positions in the filter sequence (TL DDWA DG) (Yue et al., 2002).
After introducing acidic molecules to silica sample with preadsorbed base, additional shifts of the band of silanol groups already perturbed by bases occur that are interpreted as caused by interaction of the acid with the oxygen atom of silanol group, leading to the H-bond strengthening.
Modified PPTAs were made by introducing ionic, propanesulfonate groups and nonionic, propyl groups.
To evaluate the possible consequences of introducing an acidic group at this position, we have modelled the wt CaMKII γ C-1 isoform, its phosphorylated form and the S26D mutant based on the structure of PKA (PDB entry 1ATP).
To introduce acidic and basic units in the nanocomposite, the thiol groups were oxidized by H2O2 to provide SO3H groups and Cl then allowed to react with imidazole.
Peppery and unbending as ever, Tomlin could animate any old dreck – and in the early stages of Paul Weitz's swiftly sketched character comedy, which introduce acidic lesbian poet Elle (Tomlin) as a strident grouch-by-numbers, it seems she may have to.
Thus, in the context of matrix engineering, by producing Nɛ-carboxymethyllysine, glucuronic acid offers a convenient way of introducing additional stable acidic groups into protein matrices.
This sensitivity issue was addressed by introducing a second acidic end-group to allow doubly deprotonated oligomers with no impact on their CID behavior.
Dilute base-washing has been shown to remove oxidation debris by converting the acidic groups to their dissolvable conjugate salts.
However, contrary to reports in the literature, the NaOH consumed by non-desorbed acidic groups has to be accounted for and impedes distinction of desorbed acidic groups via their pKa values.
