1. Protein secretion via the Type I secretion system Ian Henderson, Freya Hodges, Chris Icke and Von Torres 2. Purine utilization by enterobacteria Valley Stewart 3. Microbiology of Algae Daniel James Gilmour 4. John D. Helmann 5. Jonathan Todd and Ornella Carrion Fonseca 6. Growth of enteric bacteria in the intestine on C4DCs: Governance of C4DC transporters in metabolic adaptation and genetic control Gottfried Unden and Christopher Schubert 7. Biological functions of bacterial lysophospholipids Marc Wosten, Xuefeng Cao and Jos van Putten