The chelator EGTA is used as a masking agent that prevents Zn2+ binding to a small-molecule fluorescent Zn2+ reporter such as PAR.
In these experiments precision-cut tissue slices from two existing transgenic mouse strains, with transgenes that couple promoting or binding elements to a reporter protein, were used for determination of reporter induction.
Such conformational changes can be harnessed to transduce ligand binding to a fluorescence change of a fluorophore reporter, local to that region of the protein so that it responds to the change in structural environment.
For comparison, TOPFlash was co-transfected with an expression vector for dominant negative TCF-1 (dnTCF-1) which competes with endogenous LEF/TCFβ-catenin complexes for binding to the reporter.
To determine whether the inhibitory effects exerted by miR-19a/b on MTUS1 expression are mediated via binding of miR-19a/b to their presumed target sites in the MTSU1 mRNA 3′-UTR, the entire MTSU1 3′-UTR conthening the presumed miR-19a/b binding sites was fused to a reporter plasmid downstream of the firefly luciferase gene.
In this new molecular sensor, zinc binding is transduced into a readily detected fluorescence signal by use of an engineered conformational coupling mechanism linking ligand binding to reporter group response.
Similarly, addition of free m7G-cap to the RRL translation reaction in trans, to competitively inhibit eIF4E binding to reporter mRNAs, significantly reduced C9RAN in all three readings frames without affecting CrPV expression levels (Fig. 2c).
Binding affinities were classified as strong when the binding of a reporter peptide was inhibited by 75 100%, related to the inhibition of reporter peptide binding by a positive control peptide or as intermediate when the inhibition was 50 75%.
Binding affinities were classified as strong when the binding of a reporter peptide was inhibited by 75 100% with respect to inhibition of the reporter peptide binding by a positive control peptide, as intermediate when the inhibition was 50 74% and as weak when the inhibition was 25 49%.
Over the course of the two-hour conversation, a few bits of paper fell from the spiral binding of a reporter's notebook.
