The Directed Movement of Substances (such As Macromolecules Small Molecules Ions) Into Out of or Within a Cell or Between Cells or Within a Multicellular Organism by Means of Some Agent Such As a Transporter or Pore.
The Region Between the Inner (cytoplasmic or Plasma) Membrane and Outer Membrane of Organisms with Two Membranes Such As Gram Negative Bacteria. These Periplasmic Spaces Are Relatively Thick and Contain a Thin Cell Wall.
A Complex For the Transport of Metabolites Into and Out of the Cell Typically Comprised of Four Domains; Two Membrane Associated Domains and Two ATP Binding Domains At the Intracellular Face of the Membrane That Form a Central Pore Through the Plasma Membrane. Each of the Four Core Domains May Be Encoded As a Separate Polypeptide or the Domains Can Be Fused in Any One of a Number of Ways Into Multidomain Polypeptides. in Bacteria and Archaebacteria Abc Transporters Also Include Substrate Binding Proteins to Bind Substrate External to the Cytoplasm and Deliver It to the Transporter.
Interacting Selectively and Non Covalently with a Transition Metal Ions; a Transition Metal Is an Element Whose Atom Has an Incomplete D Subshell of Extranuclear Electrons or Which Gives Rise to a Cation or Cations with an Incomplete D Subshell. Transition Metals Often Have More Than One Valency State. Biologically Relevant Transition Metals Include Vanadium Manganese Iron Copper Cobalt Nickel Molybdenum and Silver.