BAPTAanditsderivativesarecalciumchelatorsthatarecommonlyusedtoformcalciumbufferswithwell-definedcalciumconcentrations.ByinjectingthechelatorsintocellsorbyincubatingcellswiththeAMesterformofthechelators,onecancontrolthecytosoliccalciumconcentration,animportantmeanstostudytherolesofcalcium.KeyadvantagesofthesecalciumchelatorsincluderelativeinsensitivitytowardintracellularpHchangeandfastreleaseofcalcium.BiotiumoffersseveralBAPTAchelatorswithcalciumdissociationconstantscoveringthebiologicallysignificantrangefrom10-7to10-2M.
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