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 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.
Interacting Selectively and Non Covalently with Retinol Vitamin A1 2 6 6 Trimethyl 1 (9' Hydroxy 3' 7' Dimethylnona 1' 3' 5' 7' Tetraenyl)cyclohex 1 Ene One of the Three Components That Makes Up Vitamin A. Retinol Is an Intermediate in the Vision Cycle and It Also Plays a Role in Growth and Differentiation.