Related Experiment Video
Updated: Feb 3, 2026

Use of Label-free Optical Biosensors to Detect Modulation of Potassium Channels by G-protein Coupled Receptors
Published on: February 10, 2014
Electrical coupling and its channels
1Department of Pharmacology, Physiology, and Neuroscience, Rutgers New Jersey Medical School, Newark, NJ aharris@njms.rutgers.edu.
Electrical communication between neurons involves gap junctions, which allow direct current flow and transfer of small molecules. Connexins form these channels, mediating both electrical and chemical signaling in excitable tissues.
Area of Science:
- Neuroscience
- Cell Biology
- Biophysics
Background:
- Early 20th-century research on neuronal communication primarily focused on chemical synaptic transmission.
- Emerging evidence in the 1950s indicated limitations of chemical transmission to explain all electrical signaling between neurons.
Observation:
- Direct intercellular pathways for current flow were identified, leading to the discovery of gap junctions.
- Gap junction channels were found to mediate passive ion movement and transfer of small molecules between cells.
Findings:
- Gap junctions facilitate both electrical and chemical signaling through the intercellular transfer of ions and small molecules.
- Connexins, a protein family in vertebrates, form these crucial gap junction channels.
- Biophysical techniques have been instrumental in characterizing gap junction channel structure and function.
Implications:
- Understanding gap junctions is vital for comprehending electrical and chemical signaling in excitable tissues.
- Connexin research elucidates mechanisms of intercellular communication, impacting neuroscience and cell biology.
- The study of gap junctions has significantly advanced our knowledge of channelopathies and related diseases.
More Related Videos
08:58Silicon Nanowires and Optical Stimulation for Investigations of Intra- and Intercellular Electrical Coupling
Published on: January 28, 2021
09:10Direct-Coupled Electroretinogram DC-ERG for Recording the Light-Evoked Electrical Responses of the Mouse Retinal Pigment Epithelium
Published on: July 14, 2020
Related Concept Videos
Ion Channels
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the involved orbitals. The...
G-protein Coupled Receptors
Spin–Spin Coupling: One-Bond Coupling
Couple
A typical example to understand this concept is tightening a bolt with a lug wrench. A...