Tight junctions (TJs) and adherens junctions (AJs) comprise epithelial apical junctions that adhere neighboring epithelial cells and determine tissue organization. They are highly dynamic structures that undergo continuous remodeling during physiological morphogenesis and under pathological conditions. The assembly and disassembly of epithelial apical junctions is regulated by the interplay bet...

Electron transport in branched semiconductor nanostructures provides many possibilities for creating fundamentally new devices. We solve the problem of its calculation using a quantum network model. The proposed scheme consists three computational parts: S-matrix junction, terms junctions’ S-matrices, electric currents through based on S-matrix. To calculate we propose scattering boundary condi...

The electrical properties of oligopthiophene-based hybrid gold–graphene junctions were measured with the STM- I ( s ) method to determine attenuation factor and effect specific anchoring groups. It shows that graphene is an effective contact in forming nano-junctions.

In this research article, we analyze phonon scattering in branched single-walled carbon nanotube (SWCNT) networks with SWCNT–SWCNT Tand Xjunctions using the wave packet method. Five phonon branches including the longitudinal acoustic, twisting, transverse acoustic, radial breathing, and flexural optical modes are selected to study energy reflection, ramification, and transmission through Tand X...

The organization of tissues depends on intercellular junctions that connect individual cells to each other. In sheets of epithelial cells the junctions contain different components like adherens junctions or tight junctions in an asymmetric distribution along the cell-cell contacts. Tight junctions are located at the most apical region of cell junctions, act as a regulatable barrier for small s...

Intercellular junctions mediate adhesion and communication between adjoining endothelial and epithelial cells. In the endothelium, junctional complexes comprise tight junctions, adherens junctions, and gap junctions. The expression and organization of these complexes depend on the type of vessels and the permeability requirements of perfused organs. Gap junctions are communication structures, w...

Although intercellular junctions are known to be the major regulators of permeability of simple epithelia, they had not been thought to be important in regulating the permeability of stratified mammalian epithelia. Furuse et al. (2002)(this issue) demonstrate that functional tight junctions may indeed be a necessary part of the permeability barrier of the skin.

Endoplasmic reticulum-plasma membrane (ER-PM) junctions mediate crucial activities ranging from Ca2+ signaling to lipid metabolism. Spatial organization of ER-PM junctions may modulate the extent and location of these cellular activities. However, the morphology and distribution of ER-PM junctions are not well characterized. Using photoactivated localization microscopy, we reveal that the conta...

Intercellular junctions in the developing retina of the locust Schistocerca gregaria have been examined by electron microscopy. Different types of junction appear in a well defined sequence during development. Five stages of ommatidial development are described. Close junctions and punctate junctions are present throughout development. Gap junctions appear transiently amongst the undifferentiat...

Small vascular units consisting of an arteriole, its capillaries, and the emerging venule (ACV units) were identified in the rat omentum and mesentery. They were fixed in situ and processed for electron microscopy either as whole units or as dissected segments. Systematic examination of the latter (in thin sections, as well as in freeze-cleaved preparations) showed that the intercellular juncti...