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.
1 Capsid â a protein that protects the genome. 2  Protease â enzyme that processes viral proteins and allows assembly or maturation to infect other virus cells. 3  Glycoprotein â (enveloped viruses only) allows virus to enter a cell, targets specific cell types for virus, and aids in virus assembly.lso, some genomes are linear, meaning that there is a beginning and end to the genome, while other genomes are circular (no beginning and no end, Kind of like that friendship song, except by friends we mean piles of microscopic goo).