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Digitally scanned image of electron micrographs of US3-null mutant virus-infected cells harvested and fixed late in infection. Thin sections were probed with UL31 protein-specific rabbit polyclonal antisera. Regions labeled with gold beads are marked with arrowheads labeled pUL31. The nucleus, nuclear membrane, and cytoplasm are labeled in panel A, and the nucleus is designated in panel B. Original magnifications: A, ×30,000; B, ×45,000.
