Look up: Aequorin

1. 
   aequorin
   Protein (30 kD) extracted from jellyfish ( Aequorea aequorea ) that emits light in proportion to the concentration of calcium ions. Used to measure calcium concentrations, but has to be microinjected into cells. Contains EF-hand motif. See also bioluminescence.
   Found on http://www.mblab.gla.ac.uk/dictionary/
   
   
2. 
   aequorin
   <chemical> A photoprotein isolated from the bioluminescent jellyfish aequorea. It emits visible light by an intramolecular reaction when a trace amount of calcium ion is added. The light-emitting moiety in the bioluminescence reaction is believed to be 2-amino-3-benzyl-5-(p-hydroxyphenyl)pyrazine (af-350). ... Chemical name: Aequorins ... (12 D ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
3. 
   Aequorin
   `Aequorin` is a photoprotein isolated from luminescent jellyfish (like various `Aequorea` species e.g. `Aequorea victoria`) and a variety of other marine organisms. Aequorin is composed of two distinct units, the apoprotein `apoaequorin`, with an approximate molecular weight of 22 kDa, and the prosthetic group `coelenterazine` (molecular weight 472), a molecule belonging to the luciferin family. In the presence of molecular oxygen the two compo...
   Found on http://en.wikipedia.org/wiki/Aequorin
   
   
4. 
   aequorin
   A luminescent protein isolated from the jellyfish Aequorea which emits blue light in the presence of even minute amounts of calcium ion; injected intracellularly, it is used to measure free calcium ion transients within cells. See Also: quin-2, fura-2
   Found on http://www.stedmans.com/section.cfm/45