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Fluorescent principle. Fluorescent microscope. DAPI. FITC. Alexa 488. Tetramethylrhodamine/TRITC. Rhodamin. Rhodamin Red-X. Alexa 568. Alexa 647. Texas-Red and Texas-Red-X. Alexa 594. Cy-Series. GFP and GFPuv. E-GFP's and DsRed. Table of Fluorescent Proteins.
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GFP is a 238-amino acid protein originally isolated from the bioluminescent jellyfish Aequoria victoria Can be expressed in any organism without additional cofactors What is green fluorescent protein (GFP) ?
Structure of GFP • Structurally, GFP represents a new motif which has been named the “β-can” • The “can” consists of 11 β-strands and a central α-helix
Fluorescence is mediated by a fluorophore located at the center of the protein GFP-Fluorophore
Structure of the GFP-fluorophore • The fluorophore is derived from the tripeptide -Ser65-Tyr66-Gly67- • Formation of the fluorophore occurs in an autocatalytic manner