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 Component of a Membrane Consisting of Gene Products and Protein Complexes That Have Some Part That Penetrates At Least One Leaflet of the Membrane Bilayer. This Component Includes Gene Products That Are Buried in the Bilayer with No Exposure Outside the Bilayer.
The Space External to the Outermost Structure of a Cell. For Cells Without External Protective or External Encapsulating Structures This Refers to Space Outside of the Plasma Membrane. This Term Covers the Host Cell Environment Outside an Intracellular Parasite.
A Postsynaptic Membrane That Is Part of Another Organism I.e. a Secondary Organism with Which the First Organism Is Interacting. a Postsynaptic Membrane Is a Specialized Area of Membrane Facing the Presynaptic Membrane On the Tip of the Nerve Ending and Separated From It by a Minute Cleft (the Synaptic Cleft). Neurotransmitters Transmit the Signal Across the Synaptic Cleft to the Postsynaptic Membrane.