It was a pleasure to give a research seminar at the Centro de Biologia Molecular Severo Ochoa (CBMSO) in Madrid, Spain, invited by Dr Antonio Alcami (http://www.cbm.uam.es/joomla-rl/index.php/en/scientific-departments/virology-and-microbiology?id=%20715). I presented our work on Poxvirus manipulation of the Ubiquitin Proteasome System, and set up the basis for future collaborative work with Antonio and his post-doc Bruno Hernaez.