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.
Myoglobin is a small oxygen-binding protein found in muscle cells. Its functions primarily in storing oxygen and facilitating oxygen diffusion in muscle tissue. Myoglobin is a single-chain globular protein that consists of 153 amino acids and a heme group (an iron-containing porphyrin).The globular structure of myoglobin consists mainly of alpha helices linked together by various turns.yoglobin is a single-chain globular protein that consists of 153 amino acids and a heme group (an iron-containing porphyrin). The globular structure of myoglobin consists mainly of alpha helices linked together by various turns.