AggA is required for aggregation and increased biofilm formation of a hyper-aggregating mutant of Shewanella oneidensis MR-1., De Windt, Wim, Gao Haichun, Krömer Wolfgang, Van Damme Petra, Dick Jan, Mast Jan, Boon Nico, Zhou Jizhong, and Verstraete Willy , Microbiology, 2006 Mar, Volume 152, Issue Pt 3, p.721-9, (2006)