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  • Title: Measuring circular dichroism in a capillary cell using the b23 synchrotron radiation CD beamline at diamond light source.
    Author: Jávorfi T, Hussain R, Myatt D, Siligardi G.
    Journal: Chirality; 2010; 22 Suppl 1():E149-53. PubMed ID: 21038386.
    Abstract:
    Synchrotron radiation circular dichroism (SRCD) is a well-established method in structural biology. The first UV-VIS beamline dedicated to circular dichroism at Diamond Light Source, a third generation synchrotron facility in South Oxfordshire, has recently become operational and it is now available for the user community. Herein we present an important application of SRCD: the CD measurement of protein solutions in fused silica rectangular capillary cells. This was achieved without the use of any lens between the photoelastic modulator and the photomultiplier tube detectors by exploiting the high photon flux of the collimated beam that can be as little as half a millimeter squared. Measures to minimize or eliminate vacuum-UV protein denaturation effects are discussed. The CD spectra measured in capillaries is a proof of principle to address CD measurements in microdevice systems using the new B23 SRCD beamline.
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