Quorumpeps database: chemical space, microbial origin and functionality of quorum sensing peptides. - Evelien Wynendaele; Antoon Bronselaer; Joachim Nielandt; Matthias D'Hondt; Sofie Stalmans; Nathalie Bracke; Frederick Verbeke; Christophe Van De Wiele; Guy De Tré; Bart De Spiegeleer (Nucleic Acids Res., 2013)