期刊
ARCHIVES OF VIROLOGY
卷 145, 期 4, 页码 827-834出版社
SPRINGER-VERLAG WIEN
DOI: 10.1007/s007050050675
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Amino acids Lys34, His36, and Phe37 were substituted by PCR-mediated, site-directed mutagenesis for three Trp's in the AcNPV polyhedrin sequence. Phase contrast microscopy reveled refringent, amorphous polyhedra in the nuclei of infected cells. Electron microscopy confirmed a great variation in form and size of the mutated polyhedra. Although crystallization of the mutated polyhedrin occurred, it was irregular within each polyhedron. Virion occlusion was also severely affected. Virions were partially occluded, or only one virion was occluded per polyhedron. Results suggest that the substitution of these three amino acids affected the morphology of polyhedra, the uniformity of crystallization within each polyhedron, and the virion occlusion.
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