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Protein & lipid trafficking in malaria parasite-infected erythrocytes Leann Tilley Nick Klonis Department of Biochemistry, La Trobe University Melbourne.

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Presentation on theme: "Protein & lipid trafficking in malaria parasite-infected erythrocytes Leann Tilley Nick Klonis Department of Biochemistry, La Trobe University Melbourne."— Presentation transcript:

1 Protein & lipid trafficking in malaria parasite-infected erythrocytes Leann Tilley Nick Klonis Department of Biochemistry, La Trobe University Melbourne parasite erythrocyte cytosol

2 Fluorescence Recovery After Photobleaching (FRAP) of host membrane proteins uRBC troph Quantitative methods for measuring oxidative stress in various compartments of the infected erythrocyte pre- bleach post-bleach 0.1 min5 min DIC D = 3.0 × 10 -3 µm 2 /sec f mob = 0.48

3 Pre- bleach Postbleach t=60 st=0t=1 s Photobleaching methods reveal novel protein trafficking pathways in infected erythrocytes Need for fluorescence correlation spectroscopy / cross-correlation methods to improve resolution prebleachpostbleach t=0t=2 mint=10 sec

4 R 0.3 ≥0.7 Wavelength (nm) Fluorescence bright particles general staining R 0.35 ≥0.65 Spectral imaging of Nile Red reveals different lipid environments in infected erythrocytes DIC fluorescence image Ratiometric image

5 ChemistryPhysicsMaths Malaria Cell Biology Photobleaching Methods Spectral Imaging Polarisation Imaging Fluorescence Correlation/ Cross-Correlation Methods ?????? ? Other


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