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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
(A) BPV L1 structural protein detected in hyperplastic epithelium. (B) No L1 protein is shown in hyperplastic epithelium where primary anti-L1 antibody was replaced by appropriate species- and isotype-matched immunoglobulins.