In biology, transport refers to the act or the means by which a molecule or ion is moved across the cell membrane or via the bloodstream. There are two types of transport in this regard: (1) passive transport and (2) active transport. Passive transport is a kind of transport by which ...
Transport and inhibition mechanisms of the human noradrenaline transporter Cryo-electron microscopy structures of the noradrenaline transporter (NET) reveal binding modes of adrenaline, coordination of sodium and chloride ion binding and the binding sites and mechanisms of inhibition by conotoxin, bupropion ...
Types of passive transport In moving substances across a biological membrane, a passive transport may or may not need the assistance of a membrane protein. There are four major types of passive transport are (1) simple diffusion, (2) facilitated diffusion, (3) filtration, and (4) osmosis. ...
Mechanics and pharmacology of substrate selection and transport by eukaryotic ABC exporters This review proposes an up-to-date, consensus thermodynamic model for the conformational changes associated with transport by the eukaryotic type I exporters from the ABC family and discusses structural insights in...
Some sponge tissues are specialized for transport of nutrients [70] and others are heavily endowed with skeletal parts, presumably for support or protection. Sponge embryos are mostly brooded, so dynamic cell lineage tracing is difficult. In general, early cell movements that are similar to ...
4systems biology系统生物学An approach to studyingbiologythat aims to model the dynamic behavior of whole biological systems based on a study of the interactions among the system’s parts.一种研究生物学的方法,旨在基于对系统各部分相互作用的研究来模拟整个生物系统的动态行为。
After pollination, we covered the leaves of this fruiting branch with a brown paper envelope, and in order to further restrict nutrient transport, fruiting branches were girded (S treatment). The AZ tissue (peduncle–fruiting branch junction) of the first fruit boll was collected at 0 day(S0)...
Page 1 of 15 (page number not for citation purposes) BMC Cell Biology 2005, 6:15 http://www.biomedcentral.com/1471-2121/6/15 Background The rab/Ypt proteins represent a large family of small GTPases involved in several transport steps of the cellular trafficking pathway. At present 11 ...
Types of Active Transport Primary active transport: the energy from hydrolyzing ATP is directly coupled to the movement of sodium ions across a biological membrane Secondary active transport: where one substrate moves down its concentration gradient while the other moves against the concentration gradient...
Microtubules are polarized cytoskeletal filaments that serve as tracks for intracellular transport and form a scaffold that positions organelles and other cellular components and modulates cell shape and mechanics. In animal cells, the geometry, density and directionality of microtubule networks are major ...