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They form hexagonal pores or channels through which ions, sugars, and other small molecules can pass. Each pore is made of 12 connexin molecules; 6 form a hemichannel on one cell membrane and interact with a hemichannel on an adjacent cell membrane. The permeability of these junctions is regulated by many factors including pH and Ca 2 ...
Schematic of cell adhesion. Cell adhesion is the process by which cells interact and attach to neighbouring cells through specialised molecules of the cell surface. This process can occur either through direct contact between cell surfaces such as cell junctions or indirect interaction, where cells attach to surrounding extracellular matrix, a gel-like structure containing molecules released ...
The connexon complexes stretches across the cell membrane and when two adjacent cell connexons interact, they form a complete gap junction channel. [9] [10] Connexon pores vary in size, polarity and therefore can be specific depending on the connexin proteins that constitute each individual connexon.
Strangers are more comfortable sitting adjacent to each other, if there is an armrest, to mark their personal space. The parallel orientation of the modular seat units also minimizes face-to-face contact, making it seem less threatening for strangers.
This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...
Single-celled organisms can bind to each other through surface receptors for cooperation and competition. This has been widely observed in bacteria. For instance, bacteria can attach to each other through the binding of outer membrane proteins TraA and TraB to facilitate a process called outer membrane exchange (OME) that allows bacterial cells ...
Also three-prime untranslated region, 3' non-translated region (3'-NTR), and trailer sequence. 3'-end Also three-prime end. One of two ends of a single linear strand of DNA or RNA, specifically the end at which the chain of nucleotides terminates at the third carbon atom in the furanose ring of deoxyribose or ribose (i.e. the terminus at which the 3' carbon is not attached to another ...
Within each of the alpha and beta subunits there is a large extracellular domain, a transmembrane domain and a short cytoplasmic domain. [13] The extracellular domain is where the ligand binds through the use of divalent cations. The integrins contain multiple divalent cation binding sites in the extracellular domain [14]). The integrin cation ...