Single-crystal X-ray diffraction of 1 [monoclinic, space group C2/c, a=11.310(4) Å, b=9.704(4) Å, c=23.798(10) Å, β=97.401(10)°, Z=4] revealed that the ZnII ion coordinates to the chelating tetradentate ligand H2EDTA and a water molecule, taking a distorted trigonal-bipyramid geometry.
Mobile protons, such as those present in a small water molecule, take a relatively long time for their signal to decay in the detector plane and, as a result, the long T2 values produce a large signal on T2-weighted imaging.
Prying the hydrogen loose from those molecules takes a lot of energy, though, and storing it once it has been extracted also poses major problems.
FRAP involves tagging a protein of interest with a fluorescent molecule, taking an image of the basal fluorescence level, photobleaching a specific area of interest with high-intensity laser illumination, and then quantifying the recovery of fluorescence intensity as unbleached molecules switch places in the area of interest with the bleached molecules (Table 1D).
This is a water molecule taken an extra oxygen and exist in metastable state.
The hydrophilic surface of GP molecules, taking a polypeptide segment as example (bottom left in the diagram), is charged (shown as blue square and circular dot) in the aqueous solution while the hydrophobic groups (shapes in grey) are wrapping inside the molecule.
Consequently, if at a specific substrate concentration several β-casein molecules bind to the DegP trimers forming the cage, and each β-casein molecule takes on a size several times larger than its molecular weight, then DegP12 will not be large enough and DegP24 cages will be required to enclose the substrate.
The pair correlation function method (pCF) measures the time a molecule takes to migrate from one location to another within the cell in the presence of many molecules of the same kind.
For instance, if a molecular species is initially localized in the cytosol but bound to translocate to the nucleus, one can measure how long each molecule takes to translocate, associate a delay to each arrival time, and draw statistics on it.
