Part I Mitochondria -- Function and regulation of mitochondrial voltage-dependent anion channel -- Mitochondrial Protein Import Channels -- Electrophysiology of the mitochondrial apoptosis-induced channel, MAC -- Ceramide Channels -- Part II Bacteria and viruses -- Bacterial Porins -- Electrophysiology of Bacterial Translocons -- Viroporins -- Part III Toxins and antimicrobial peptides -- Pore-forming colicins- unusual ion channels -unusually regulated -- Anthrax Toxin Protective Antigen Forms an Unusual Channel that Unfolds and Translocates Proteins Across Membranes -- Staphylococcal b-barrel Pore-forming Toxins: Mushrooms That Breach the Greasy Barrier -- Properties of pores formed by cholesterol-dependent cytolysins and actinoporins -- Part IV Other unconventional channels -- Perforins -- Gap Junction Channels: The electrical conduit of the intercellular world -- Amyloid Peptide Channels -- From phototaxis to biomedical applications: Investigating the molecular mechanism of channelrhodopsins.