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. 2015 Jul 3;3(3):503–518. doi: 10.3390/vaccines3030503

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© 2015 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

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(A) Materials released from Vero/hSLAM cells infected with MVvac2DIII-S,S)P or MVvac2(HBsAg)N collected 72 h after infection were clarified, and particulate material pelleted, loaded on a 20% to 60% sucrose gradient, and centrifuged to equilibrium. Five hundred microliter fractions were collected from the top (left) to the bottom (right) and weighed. The dotted line shows a representative density profile. (B) Aliquots of each fraction were separated by 12.5% SDS-polyacrylamide gel electrophoresis, immunoblotted, and probed with anti-HBsAg antibodies for fractions coming from cells infected with MVvac2DIII-S,S)P (upper panel) or MVvac2(HBsAg)N (medium panel). The lower panel indicates the migration of infectious MV virions.