A cell-impermeable fluorescent potassium indicator
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IPG-4 TMA

Item No. 35539

Product Insert (PDF)Safety Data Sheet (SDS) (PDF)
Technical Information
Synonyms
  • APG-4
  • Asante Potassium Green-4
  • Ion Potassium Green-4
Molecular Formula
C58H64Cl2N3O15 • 3C4H12N
Formula Weight
1336.5
Purity
≥85%
Emission
545 nm
Excitation
525 nm
Formulation (Request formulation change)
A solid
Solubility(Learn about Variance in Solubility)
Water: Soluble
λmax
524 ± 3 nm
SMILES
ClC1=C2C(C(C3=CC(OCCOC)=C(N(CCOC4=C(N5CCOCCOCCN6CCOCCOCC5)C=CC(C)=C4)CCOC7=C6C=CC(C)=C7)C=C3)=C(C=C8CCC([O-])=O)C(O2)=C(Cl)C8=O)=CC(CCC([O-])=O)=C1[O-].C[N+](C)(C)C.C[N+](C)(C)C.C[N+](C)(C)C
InChi Code
InChI=1S/C58H67Cl2N3O15.3C4H12N/c1-37-4-9-44-47(32-37)75-24-18-63(19-25-76-48-33-38(2)5-10-45(48)62-16-22-73-29-27-71-20-14-61(44)15-21-72-28-30-74-23-17-62)46-11-6-39(36-49(46)77-31-26-70-3)52-42-34-40(7-12-50(64)65)55(68)53(59)57(42)78-58-43(52)35-41(8-13-51(66)67)56(69)54(58)60;3*1-5(2,3)4/h4-6,9-11,32-36,68H,7-8,12-31H2,1-3H3,(H,64,65)(H,66,67);3*1-4H3/q;3*+1/p-3
InChi Key
LFGLCDXLIJKEQN-UHFFFAOYSA-K
Shipping & Storage Information
Storage
-20°C
Shipping
Wet ice in continental US; may vary elsewhere
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    Product Description

    IPG-4 TMA is a cell-impermeable fluorescent potassium indicator that has been used to detect extracellular potassium in B. subtilis biofilms.1 It binds to potassium (Kd = 7 mM) and displays excitation/emission maxima of 525/545 nm, respectively. IPG-4 TMA is also available in a cell-permeable form (Item No. 35541).

    WARNING This product is not for human or veterinary use.

    References & Product Citations
    Product Description References

    1. Prindle, A., Liu, J., Asally, M., et al. Ion channels enable electrical communication in bacterial communities. Nature 527(7576), 59-63 (2015).