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Volume 96, Issue 1, Pages (January 2009)

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1 Volume 96, Issue 1, Pages 209-216 (January 2009)
Raman Study of Mechanically Induced Oxygenation State Transition of Red Blood Cells Using Optical Tweezers  Satish Rao, Štefan Bálint, Benjamin Cossins, Victor Guallar, Dmitri Petrov  Biophysical Journal  Volume 96, Issue 1, Pages (January 2009) DOI: /biophysj Copyright © 2009 Biophysical Society Terms and Conditions

2 Figure 1 Schematic of the confocal Raman spectroscopy system with a dual-spot optical trap. Biophysical Journal  , DOI: ( /biophysj ) Copyright © 2009 Biophysical Society Terms and Conditions

3 Figure 2 Camera image of the RBC trapped by two beams in the equilibrium (left) and stretched (right) conditions. Biophysical Journal  , DOI: ( /biophysj ) Copyright © 2009 Biophysical Society Terms and Conditions

4 Figure 3 Sample raw Raman spectrum of an RBC trapped with two beams in its equilibrium position. Biophysical Journal  , DOI: ( /biophysj ) Copyright © 2009 Biophysical Society Terms and Conditions

5 Figure 4 Raman spectra of equilibrium (top spectra) and stretched (bottom spectra) states of the RBC after smoothing and background subtraction. The spectra are separated into three well-characterized regions. The shaded areas represent the bands that changed consistently between equilibrium and stretched conditions for the majority of the sample of cells. Biophysical Journal  , DOI: ( /biophysj ) Copyright © 2009 Biophysical Society Terms and Conditions

6 Figure 5 Close-up views of the highlighted bands from Fig. 4. For each graph, the top and bottom spectra are from the equilibrium and stretched states, respectively. Biophysical Journal  , DOI: ( /biophysj ) Copyright © 2009 Biophysical Society Terms and Conditions

7 Figure 6 Global representation (a) and close-up view (b) of the lowest energy configuration of the binding of two Hb molecules modeled from the protein-protein docking algorithms. The arrows identify the points of contact at the F-helix. Biophysical Journal  , DOI: ( /biophysj ) Copyright © 2009 Biophysical Society Terms and Conditions

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