High-quality mapping of DNA-protein complexes by dynamic scanning force microscopy

S Gao; L Chi; S Lenhert; B Anczykowski; C M Niemeyer; M Adler; H Fuchs

doi:10.1002/1439-7641(20010618)2:6<384::AID-CPHC384>3.0.CO;2-3

High-quality mapping of DNA-protein complexes by dynamic scanning force microscopy

Chemphyschem. 2001 Jun 18;2(6):384-8. doi: 10.1002/1439-7641(20010618)2:6<384::AID-CPHC384>3.0.CO;2-3.

Authors

S Gao¹, L Chi, S Lenhert, B Anczykowski, C M Niemeyer, M Adler, H Fuchs

Affiliation

¹ Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Münster, Germany.

PMID: 23686960
DOI: 10.1002/1439-7641(20010618)2:6<384::AID-CPHC384>3.0.CO;2-3

Abstract

Biomolecular complexes, nanocircles and aggregates of DNA and streptavidin (STV) are studied by dynamic scanning force microscopy. More structural details are observed with an improved dynamic mode assisted with a special feedback circuit (Q-control), as shown in the picture. Under otherwise identical conditions, these improvements indicate that the well cited models relating enlarged lateral size to the finite geometry of the SFM tip have to be modified for soft samples susceptible to tip-sample interactions.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

DNA / chemistry*
Microscopy, Atomic Force
Nanostructures / chemistry*
Particle Size
Streptavidin / chemistry*
Surface Properties

Substances

DNA
Streptavidin