Systems Microbiology the single cell as a well-stirred bio-reactor the importance of diffusion and Systems Cell Biology gradients for cellular regulation in a single cell Systems Developmental How to build a multicellular Biology organism from single cells Cell-Cell communicationSystems Microbiology Systems Cell Biology Systems Developmental Biology the single cell as a well-stirred bio-reactor the importance of diffusion and gradients for cellular regulation in a single cell How to build a multicellular organism from single cells Cell-Cell communication 2