{"paper":{"title":"Intermediate DNA at low added salt: DNA bubbles slow the diffusion of short DNA fragments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Francoise Livolant, Joachim Raedler, Sanja Dolanski Babic, Silvia Tomic, Ticijana Ban, Tomislav Vuletic","submitted_at":"2010-10-04T23:48:50Z","abstract_excerpt":"We report a study of DNA (150 bp fragments) conformations in very low added salt $<0.05$mM, across wide DNA concentration range $0.0015\\leq c \\leq 8$~mM (bp). We found an intermediate DNA conformation in the region $0.05 < c < 1$~mM, by means of fluorescence correlation spectroscopy (FCS) and UV-absorbance measurements. FCS detected that in this region DNA has the diffusion coefficient, $D_p$ reduced below the values for both ssDNA coils and native dsDNA helices of similar polymerization degree $N$. Thus, this DNA population can not be a simple mix of dsDNA and of ssDNA which results from DNA "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.0731","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}