Force spectroscopy on single xanthan molecules

H. Li, M. Rief, F. Oesterhelt, H. E. Gaub

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

36 Zitate (Scopus)

Abstract

The mechanical properties of native and denatured xanthan are measured on the molecular scale using an AFM. The single molecule force spectra of native and denatured xanthan show big differences. For ordered native xanthan, a long plateau at around 400 pN is found, this transition is an irreversible process. However, the plateau disappears for denatured xanthan, only monotonic rising of the force versus extension is observed. The big difference is consistent with the different conformation of native and denatured xanthan. Native xanthan is assumed to exist as an ordered double-stranded helix, however, denatured xanthan is a disordered single strand. The irreversible transition process for native xanthan is attributed to the splitting of the double-strand helix.

OriginalspracheEnglisch
Seiten (von - bis)407-410
Seitenumfang4
FachzeitschriftApplied Physics A: Materials Science and Processing
Jahrgang68
Ausgabenummer4
DOIs
PublikationsstatusVeröffentlicht - Apr. 1999
Extern publiziertJa

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