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Picosecond fluorescence studies of polypeptide dynamics: fluorescence anisotropies and lifetimes

✍ Scribed by Lin X.-Q. Chen; Jacob W. Petrich; Graham R. Fleming; Angelo Perico

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 588 KB
Volume: 139
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(87)80150-1

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✦ Synopsis

Fluorescence lifetimes and anisotropies for single tryptophan-containing polypeptide hormones ACTH and ghrcagon, and a series of their fragments are reported. The anisotropy data are discussed in the context of the theory of Perico and Guenza (J.

Chem. Phys. 84 (1986) 5 10). A persistence length of about 7 to 10 residues is obtained for the mobilities in the two hormones.

The theory is able to account for chain length and probe location effects, but the calculated time dependence of the anisotropy does not tit the experimental curve well at short times.

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