eVP40-ΔPT/PY interacts with Bro1-V fragment of Alix. A, Total protein from cells transfected with eVP40-ΔPT/PY plus vector alone (lanes 1 and 2) or Bro1-V (lanes 3 and 4) was first immunoprecipitated with either rabbit pre-immune (IgG; lanes 1 and 3) serum, or anti-eVP40 (lanes 2 and 4) antiserum as indicated, and anti-HA antiserum was used to detect HA-tagged Bro1-V in the precipitated samples by Western analysis. B, Controls for expression of eVP40-ΔPT/PY, Bro1-V, and actin, are shown. Abbreviation: VLP, virus-like particle.