The tilted hybrid conformation may compensate for the reduced binding affinity of a shorter hybrid, thus assisting in the formation of early transcripts.
This segment-specific molecular recognition by FABP3 should explain how the protein excludes short FAs; the C3 C6 portion of FA is only in contact with the water molecules (Cluster 1 in Figure 4 d and e).[ 5] The resultant entropy loss and the absence of stabilization by Phe16/Ala75 may account for the drastic drop in the binding affinity of C6 and shorter FAs.
Because the duplexes formed from mis-priming are very short fragments, the binding affinity of a qPCR dye to short dsDNA fragments should correlate well with the dye's tendency to promote nonspecific amplifications.
First, the origin of such a function does not require the establishment of a complex structure ab initio; only a moderate binding affinity of RNA or a short peptide would suffice to provide the starting point for evolutionary selection.
Another possible contributing factor to PCR inhibition is the high binding affinity of the dye to dsDNA, particularly to short dsDNA fragments.
Also, the 4 nucleotides between the direct repeats may have an important role for the binding affinity of TR, since they were different from the short DR4 we studied here.
Furthermore, the network exhibit shorter turn off times as the binding affinity of TetR for TetO weakens.
N59D uniquely causes PEP binding affinity to decrease, while having little effect on the binding affinity of MgADP.
Previously published data, also using ITC, measured the chitopentaose binding affinity of WGA in the low µM range, while the binding affinity (Kd) to shorter chitin oligomers (GlcNAc 2 4 was significantly lower (i.e., mM level; Asensio, et al., 2000).
To determine the binding affinity of the aptamers, positive cells were cultured overnight and the cells dissociated using non-enzymatic dissociation buffer and/or short time (30 sec) trypsin treatment.
