Antigenic and 3D structural characterization of soluble X4 and hybrid X4-R5 HIV-1 Env trimers - Arnold, Philipp; Himmels, Patricia; Weiß, Svenja; Decker, Tim-Michael; Markl, Jürgen; Gatterdam, Volker; Tampé, Robert; Bartholomäus, Patrick; Dietrich, Ursula; Dürr, Ralf (Retrovirology, 2014)