Search results
Results from the WOW.Com Content Network
The best studied of these processes is the mass-dependent fractionation of ... each Ca 2+ ion released by chemical ... the hydroxyapatite in molecular structure ...
Rendered image of the Ca 2+ pump. Plasma membrane Ca 2+ ATPase (PMCA) is a transport protein in the plasma membrane of cells that serves to remove calcium (Ca 2+) from the cell. It is vital for regulating the amount of Ca 2+ within cells. [3] In fact, the PMCA is involved in removing Ca 2+ from all eukaryotic cells. [4]
Calmodulin is a small, highly conserved protein that is 148 amino acids long (16.7 kDa). The protein has two approximately symmetrical globular domains (the N- and C- domains) each containing a pair of EF hand motifs [5] separated by a flexible linker region for a total of four Ca 2+ binding sites, two in each globular domain. [6]
The α 1 subunit pore (~190 kDa in molecular mass) is the primary subunit necessary for channel functioning in the HVGCC, and consists of the characteristic four homologous I–IV domains containing six transmembrane α-helices each. The α 1 subunit forms the Ca 2+ selective pore, which contains voltage-sensing machinery and the drug/toxin ...
The pump has a molecular mass of 110,000 amu, shows three well separated cytoplasmic domains, with a transmembrane domain consisting of ten alpha helices and two transmembrane Ca 2+ binding sites. [ 4 ]
Molar mass: 72.076 g·mol −1 Appearance white or yellowish powder Odor: odorless Density: ... (O 2 2−) salt of Ca 2+. Commercial samples can be yellowish, but the ...
These materials contain Ca 2+ combined with the polyphosphates, such as P 2 O 4− 7 and triphosphate P 3 O 5− 10: Dicalcium diphosphate (CAS#7790-76-3]: Ca 2 P 2 O 7; Calcium triphosphate (CAS# 26158-70-3): Ca 5 (P 3 O 10) 2
The US Institute of Medicine (IOM) established Recommended Dietary Allowances (RDAs) for calcium in 1997 and updated those values in 2011. [6] See table. The European Food Safety Authority (EFSA) uses the term Population Reference Intake (PRIs) instead of RDAs and sets slightly different numbers: ages 4–10 800 mg, ages 11–17 1150 mg, ages 18–24 1000 mg, and >25 years 950 mg. [10]