Journal
INORGANIC CHEMISTRY
Volume 47, Issue 13, Pages 6077-6081Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic800440d
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Funding
- NIAID NIH HHS [R01 AI060792, R01 AI060792-01A1, R01AI060792] Funding Source: Medline
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Nuclear magnetic resonance (NMR) measurements of magnetic susceptibility have been utilized to study the equilibrium between two forms (high-spin monomer vs the antiferromagnetically coupled mu-oxo dimer) of ferriprotoporphyrin(IX) as a function of pH. The pH dependence of this equilibrium is significantly altered by the addition of either chloroquine or quinine. Chloroquine promotes the mu-oxo dimer whereas quinine promotes the monomer.
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