Neutron-scattering probe of complexes of sodium dodecyl sulfate and serum albumin during polyacrylamide gel electrophoresis
Small-angle neutron scattering (SANS) is used to probe the conformation of SDS-BSA protein surfactant complexes during electrophoresis in cross-linked polyacrylamide gels. Contrast variation permits independent probing of the structure of protein-surfactant complexes with negligible scattering contr...
| Veröffentlicht in: | Langmuir : the ACS journal of surfaces and colloids. - 1991. - 25(2009), 3 vom: 03. Feb., Seite 1558-65 |
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| 1. Verfasser: | |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2009
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| Zugriff auf das übergeordnete Werk: | Langmuir : the ACS journal of surfaces and colloids |
| Schlagworte: | Journal Article Research Support, U.S. Gov't, Non-P.H.S. Molecular Probes Serum Albumin, Bovine 27432CM55Q Sodium Dodecyl Sulfate 368GB5141J Glycoside Hydrolases EC 3.2.1.- beta-galactanase |
| Zusammenfassung: | Small-angle neutron scattering (SANS) is used to probe the conformation of SDS-BSA protein surfactant complexes during electrophoresis in cross-linked polyacrylamide gels. Contrast variation permits independent probing of the structure of protein-surfactant complexes with negligible scattering contributions from the polyacrylamide matrix. The conformation of the protein complexes in the gel is found to be independent of the electric fields that are applied in this work (10 V/cm). Furthermore, there are no signs of large-scale macromolecular orientation (anisotropy) in the scattering patterns. However, the scattering shows that there are significant interparticle correlations between the protein-surfactant complexes that are electrophoretically inserted into the gel. These interactions develop when the total concentration of protein in the gels reaches values that are larger than approximately 1 mg/mL. The correlations are due to molecular crowding in the small fraction of pores that are available for protein migration |
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| Beschreibung: | Date Completed 05.03.2009 Date Revised 16.11.2017 published: Print Citation Status MEDLINE |
| ISSN: | 1520-5827 |
| DOI: | 10.1021/la8039994 |