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cell junction

Any of various kinds of connection between cells. Tight junctions form a seal between adjacent cells, particularly in epithelia, to prevent the passage of materials between cells. A ...

cell junction

cell junction   Reference library

Oxford Dictionary of Biochemistry and Molecular Biology (2 ed.)

Reference type:
Subject Reference
Current Version:
2008
Subject:
Science and technology, Life Sciences
Length:
26 words

... junction a specialized region of connection between two cells or between a cell and the extracellular matrix. See also desmosome , gap junction , hemidesmosome , tight junction...

cell junction

cell junction   Quick reference

A Dictionary of Biology (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
65 words

...cell junction Any of various kinds of connection between cells. Tight junctions form a seal between adjacent cells, particularly in epithelia, to prevent the passage of materials between cells. A primarily structural bond between cells is provided by adherens junctions and desmosomes , whereas communication between adjacent cells is facilitated by gap junctions in animal cells and plasmodesmata in plant cells...

multi-junction photovoltaic cell

multi-junction photovoltaic cell   Quick reference

A Supplementary Dictionary of Renewable Energy and Sustainability

Reference type:
Subject Reference
Current Version:
2013

...junction photovoltaic cell A photovoltaic cell where two or more PV junctions are layered or stacked one on top of the other, which increases the overall energy conversion efficiency of solar energy to electrical energy. The increased efficiency is a result of each layer extracting energy from a particular part of the spectrum. Compare silicon spheres , concentrating photovoltaic system , photoelectrochemical cell , and ‘third generation’ photovoltaic cell...

cell junction

cell junction  

Any of various kinds of connection between cells. Tight junctions form a seal between adjacent cells, particularly in epithelia, to prevent the passage of materials between cells. A primarily ...
epithelial attachment

epithelial attachment  

A collar of non-keratinized epithelial cells forming the biological attachment to the tooth surface at the base of the gingival crevice (sulcus) in the region of the cemento-enamel junction (CEJ). It ...
adherens junction

adherens junction  

A cell junction that is commonly observed in epithelial (see epithelium) cells (e.g. those lining the intestine and those in cardiac muscle cells). At these junctions the cell membranes of the ...
intercalated disc

intercalated disc  

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The junctional complex between cardiac muscle cells that joins them end to end. The electron-dense discs contain gap junctions, desmosomes, and convoluted adherens junctions into which the actin ...
septate junction

septate junction  

A type of adhesive cell junction, particularly characteristic of invertebrate tissues, in which the membranes forming the junction are held very regularly 15–17 nm apart. Traversing this gap at right ...
NAP cell adhesion

NAP cell adhesion  

A cell adhesion system comprising nectin, afadin, ponsin, and possibly other proteins. It occurs in adherens junctions and tight junctions.
gap junction

gap junction  

A passage through the lipid bilayers of adjacent plasma membranes that mediates the transfer of small molecules or ions between interacting cells. Gap junctions are abundant in epithelial tissues and ...
musculotendinous junction

musculotendinous junction  

The connection between a muscle and its tendon. The junction contains muscle cells with sarcomere membranes, which are folded inwards in a complicated manner. The in-folding reduces the ability of ...
tight junction

tight junction  

A region of the cell surface, of variable size, and situated just below the apical border where the membranes of adjacent cells are fused to form a pentalaminar structure. In simple epithelial layers ...
cytoplasmic bridge

cytoplasmic bridge  

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A thin, direct cytoplasmic connection between two cells through which large molecules can pass (unlike gap junctions). Common in plants (plasmodesmata) but rare in animals except between nurse cells ...
cell-surface molecules

cell-surface molecules  

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Overview Page
Molecules on the surface of cell membranes that are responsible for most cellular functions directly related to their immediate environment. Many have very precise functions of adhesion (see adhesion ...
zonula occludens

zonula occludens  

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Overview Page
A specialized junction between epithelial cells that makes the epithelial sheet impermeable, even to small molecules, because the apical junctions form a complete seal around the periphery of the ...
cell signalling

cell signalling  

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Overview Page
The interchange of information between cells, usually mediated by the release of soluble factors but sometines by contact or by exchange of small molecules or ions through gap junctions.
alar cell

alar cell  

In mosses (Musci), 1 of the cells that occur at the junction of phyllode and stem.
STEAP

STEAP  

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A cell-surface antigen (six-transmembrane epithelial antigen of the prostate, 339 aa) expressed at cell–cell junctions in the secretory epithelium of prostate and strongly expressed in prostate ...
plakoglobin

plakoglobin  

ora protein of cell junctions. It is thought to play a central role in the function of desmosomes and intermediate junctions.
dye coupling

dye coupling  

Reference type:
Overview Page
A description of the intercellular communication, usually through gap junctions, detected by the passage of microinjected fluorescent dye (e.g. lucifer yellow) from one cell to another. See also ...

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