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The Ca 2+ concentration of the vacuole may reach millimolar levels. The most striking use of Ca 2+ ions as a structural element in algae occurs in the marine coccolithophores, which use Ca 2+ to form the calcium carbonate plates, with which they are covered. Calcium is needed to form the pectin in the middle lamella of newly formed cells.
The Ca 2+ in the myoplasm will diffuse to Ca 2+ regulator sites on the thin filaments. This leads to the actual contraction of the muscle. [15] Contractions of smooth muscle fiber are dependent on how a Ca 2+ influx occurs. When a Ca 2+ influx occurs, cross bridges form between myosin and actin leading to the
The first real time (video rate) Ca 2+ imaging was carried out in 1986 in cardiac cells using intensified video cameras. [3] Later development of the technique using laser scanning confocal microscopes revealed sub-cellular Ca 2+ signals in the form of Ca 2+ sparks and Ca 2+ blips.
In the simplest terms, mountain-building exposes calcium-bearing rocks such as basalt and granodiorite to chemical weathering and releases Ca 2+ into surface water. These ions are transported to the ocean where they react with dissolved CO 2 to form limestone (CaCO 3), which in turn settles to the sea floor where it is incorporated into new rocks.
When calcium ions (Ca 2+) are depleted from the endoplasmic reticulum (a major store of Ca 2+) of mammalian cells, the CRAC channel is activated to slowly replenish the level of calcium in the endoplasmic reticulum. The Ca 2+ Release-activated Ca 2+ (CRAC) Channel (CRAC-C) Family (TC# 1.A.52) is a member of the Cation Diffusion Facilitator (CDF ...
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CA2, CA-2 or CA II may refer to : Carbonic anhydrase II, a human gene; United States Court of Appeals for the Second Circuit; California's 2nd congressional district; Hummel CA-2, an ultralight aircraft; California State Route 2; Ca II, a singly-ionized calcium that produces the H and K lines, and the calcium triplet lines in the spectrum of ...
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