Accepted Papers for Presentation -------------------------------- Bogdan Aman, Mariangiola Dezani and Angelo Troina. Type Disciplines for Analysing Biologically Relevant Properties Richard Banks, Victor Khomenko and Jason Steggles. A Case for Using Signal Transition Graphs for Analysing and Refining Genetic Networks Roberto Barbuti, Andrea Maggiolo Schettini, Paolo Milazzo and Luca Tesei. Timed P Automata Federica Ciocchetta and Maria Luisa Guerriero. Modelling biological compartments in Bio-PEPA Florentin Ipate and Marian Gheorghe. Testing Non-deterministic Stream X-machine models and P systems Muskan Kukreja and Manish Kumar Gupta. Stochastic pi simulations of few RNA-interference models and its dynamics and efficacy as anti-viral treatment against HIV-1 Tommaso Mazza and Matteo Cavaliere. Cell Cycle and Tumor Growth in Membrane Systems with Peripheral Proteins Andrew Phillips. A Correct Abstract Machine for the Stochastic Bioambient calculus Thomas Anung Basuki, Antonio Cerone and Paolo Milazzo. Translating Stochastic CLS into MAUDE G. Michele Pinna and Andrea Saba. An event based semantics of P-Systems Filippo Del Tedesco and Carla Piazza. External Control in Process Algebra for System Biology Work in progress: Chiara Bodei et.al. Control Flow Analysis for Brane Calculi