T-Coffee: a web server for the multiple sequence alignment of protein and RNA sequences using structural information and homology extension. - Paolo Di Tommaso; Sébastien Moretti; Ioannis Xenarios; Miquel Orobitg; Alberto Montanyola; Jia-Ming Chang; Jean-François Taly; Cédric Notredame (Nucleic Acids Res., 2011)