Types of Compounds. Ionic compounds are compounds composed of ions, charged particles that form when an atom (or group of atoms, in the case of polyatomic ions) gains or loses electrons. 1  A cation is a positively charged ion. 2  An anion is a negatively charged ion.
Porins are members of an extended family of transmembrane proteins found in the outer membrane of gram negative bacteria such as E. coli, or in the outer membranes of mitochondria in eukaryotes. The general porins provide a simple diffusion pathway across the membrane for molecules less than 1 kDa with little substrate selectivity.
The main proteins in the inner mitochondrial membrane are: 1.) Subunits that comprise the mitochondrial electron transport chain complexes. 2.) ANT (adenine nucleotide translocator), the most abundant protein in the mitochondria IMM. 3.) UCP (uncoupling protein) 4.) TIM 23, TIM 17, and TIM 22 (translocase inner membrane) subunit proteins. 5.) mitochondrial PTP (permeability transition pore), apoptosis activity.