EGTA [Ethylene glycol-bis(2-aminoethylether)-N,N,N',N'-tetraacetic acid]

EGTA, or Ethylene Glycol-bis(2-aminoethylether)-N,N,N',N'-tetraacetic Acid, is a selective chelating agent widely used in biochemistry and cell biology to bind divalent cations, particularly calcium ions (Ca²⁺), with high specificity. Unlike EDTA, EGTA has a stronger affinity for calcium over magnesium, making it especially useful in experiments where precise control of calcium concentrations is critical for enzymatic activity, signaling pathways, or cellular processes.

EGTA is commonly employed in buffer solutions, cell culture, enzyme assays, and calcium-dependent signaling studies. Its ability to selectively sequester calcium ions helps prevent unwanted calcium-mediated reactions, stabilize proteins, and regulate intracellular calcium levels in experimental systems. Proper handling is advised, as it is a chemical reagent requiring standard laboratory safety precautions.

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