Résumé
Infrared-visible sum-frequency generation (SFG) spectroscopy is used to study the recognition of a protein (avidin) by a derivated vitamin (biocytin). No interaction is observed when the measurements are performed on metallic substrates in the normal co-propagative configuration. When the biocytin layer is deposited on a CaF2 substrate and the SFG measurements are performed in the total internal reflection configuration, drastic modifications in the C-H and N-H spectral ranges attest the molecular recognition of avidin by biocytin. The specificity of the recognition process is confirmed by replacing avidin by other proteins.
langue originale | Anglais |
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Pages (de - à) | 221-229 |
Nombre de pages | 9 |
journal | Physicalia Magazine |
Volume | 25 |
Numéro de publication | 3 |
Etat de la publication | Publié - 2003 |