FIG. 2.

Chimeric PB1-F2-EGFP fusion proteins utilized in this study. The residues incorporated in fusion proteins are shown on the left. Green dots signify EGFP. Dark blue segments represent predicted helices. Red segments represent substituted residues. All fusion proteins contained a 7-residue linker (RDPPVAT) between the PB1-F2 sequence and EGFP. The intracellular localization of the fusion proteins is summarized on the right as follows: M, mitochondrial; C, cytoplasmic and/or nuclear; NM, nonmitochondrial.