Indeed, molecular evolution of antibodies, the golden standard of binding probes, has been shown to be accompanied by such specificity fine-tuning [ 21].
Osmium tetroxide complexes, Os VIII L, binding covalently to pyrimidine residues in single-stranded DNA and RNA have shown their usefulness as probes of DNA structure in vitro (reviewed in ref (692)) and in cells (reviewed in ref (693)).
First we have shown that MO based probes can be used as an alternative for LNA based probes.
We have shown fragments to be useful probes in identifying the key binding interactions of open PPI sites as well as achieving and explaining specificity for one site over another.
For example, we and others have shown a correlation between receptor binding affinity and tumor uptake using polypeptide-based probes [23], [54].
In contrast, many other actin binding protein probes have been shown to create circles and large bundles when over expressed [24], [25].
We have shown conclusively that avoiding self-complementarity in the probe when designing an oligonucleotide array is insufficient to eliminate secondary structure from the binding site in the target.
Different targeted nuclear imaging probes have been developed against MR. The radiolabelled single-domain antigen-binding fragments derived from Camelidae heavy-chain antibodies (known as nanobodies) specifically targeting the macrophage MR have shown high potential for clinical implementation for imaging of the tumour-promoting macrophages [25, 26] and rheumatoid arthritis [27].
Another "naturally engineered" isoform, A3, while binding weakly to the CST probe (Fig. 8B,C), has shown some transcriptional activation potential on other targets in vivo (to be published elsewhere).
In addition, longer probes have been shown to decrease non-specific binding and increase overall probe affinity [ 11, 14].
