New enhanced diagnostic tools!
New BNA-NC probes allow for rapid, quantitative, sensitive, and reliable diagnostics of different mutant alleles (Shivarov et al.). A new antisense BNA/DNA-NC-peptide-conjugate for the treatment of drug-resistant infections, a Poster, and a new review “BNAs as Molecular Tools” is available as well.
Various acidic and basic functional groups on amino acid side chains and termini of proteins and peptides may be charged. The presence of a charge is dependent on the pKa values of the groups and the pH of the solution. The isoelectric point (pI) of a peptide is defined as the pH at which the peptide has a net charge of zero.
At pH values below the pI, peptides carry a net positive charge;
Above the pI, they carry a net negative charge
pI-values of peptides can be utilized as a basis for separation in solution. If a voltage is applied to a complex peptide mixture in a pH gradient, the peptide will migrate to the pH at which they are neutrally charged. The pI of a peptide maybe accurately calculated from its sequence, and provides information that complements mass spectrometric methods for protein and peptide identification.
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