2023年8月29日 · Characteristics: Calcium is a rather soft, very active metal. Very similar to barium in its chemical properties. Soluble sulfates, such as sulfuric acid, do not precipitate \ce {Ca^ {2+}} as calcium sulfate, unless the calcium ion is present in very high concentrations.

Calcium ions (Ca 2+) contribute to the physiology and biochemistry of organisms' cells. They play an important role in signal transduction pathways, [2][3] where they act as a second messenger, in neurotransmitter release from neurons, in contraction …

We will review some of the chemical properties of Ca2+ that are important to its role in biology, we will review intracellular Ca2+ stores, and we will review other Ca2+ handling proteins.

Ca 2+ is a ubiquitous intracellular messenger that controls diverse cellular functions but can become toxic and cause cell death. Selective control of specific targets depends on spatio-temporal patterning of the calcium signal and decoding it by multiple, tunable and often strategically positioned Ca 2+ sensing elements.

2021年10月14日 · Calcium (2+) is a calcium cation, a divalent metal cation and a monoatomic dication. It has a role as a human metabolite and a cofactor. Calcium ion has been reported in Artemia salina, Montanoa frutescens, and other organisms with data available.

Calcium signaling is the use of calcium ions (Ca 2+) to communicate and drive intracellular processes often as a step in signal transduction. Ca 2+ is important for cellular signaling. Once it enters the cytosol of the cytoplasm it exerts allosteric …

Thus, Ca 2+ ions have to be distributed throughout the organism and made available where needed. In higher organisms, such as humans, the blood-plasma level of total calcium is kept constant (≈2.45 mM) within narrow limits, and there must …