BAPTA
Names | |
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Preferred IUPAC name
2,2′,2′′,2′′′-[Ethane-1,2-diylbis(oxy-2,1-phenylenenitrilo)]tetraacetic acid | |
Identifiers | |
3D model (
JSmol ) |
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ChEBI | |
ChemSpider | |
ECHA InfoCard
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100.157.377 |
PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
C22H24N2O10 | |
Molar mass | 476.433 |
Density | 1.494 g/cm3 |
Melting point | 177 to 179 °C (351 to 354 °F; 450 to 452 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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BAPTA (1,2-bis(o-
EDTA
.
There is a range of reported values for the dissociation constant of BAPTA, though 0.2 μM appears consistently.[1] The rate constant for calcium binding is 500 μM−1 s−1.[1]
BAPTA is a component of some fluorescent calcium ion indicators such as Calcium Green and Oregon Green 488 BAPTA-1 and -2 (OGB-1, OGB2). These indicators change their fluorescence intensity and fluorescence lifetime depending on the calcium ion concentration.[2]
See also
- EDTA
- EGTA
- Fura-2
References
- ^ PMID 9763471.
- ^ "Fluorescent Ca2+ Indicators Excited with Visible Light—Section 19.3". The Molecular Probes Handbook. Retrieved 2024-01-22.