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Fitting of the bacteriophage φ29 portal connector complex (18) into the portal of KSHV capsid. (a) φ29 portal determined by X-ray crystallography (Protein Data Bank no. 1FOU) shown as density map filtered to 10-Å resolution (semitransparent pink) superimposed with three subunits in ribbon representation. (b) φ29 portal (red) fitted into the KSHV portal. The orientations of the side views are the same as those in Fig. 2d and e.
