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.
Globular proteins are water soluble proteins with spherical shapes and irregular amino acid sequences. The polypeptide chains are folded in, to form their shapes, and this shape is specific for each globular protein type.The water solubility of globular proteins enables them to transport through blood and other body fluids to various locations where their action is required. Globular proteins often have several types of secondary structure, whereas fibrous proteins contain a single type of secondary structure. â¢ The number of different types of globular proteins is higher than that of fibrous proteins.