The acid dissociation of haemin

Lea Singer; M. L. Kremer

doi:10.1016/0304-4165(72)90187-0

The acid dissociation of haemin

Lea Singer^*
, M. L. Kremer

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The acid dissociation constant of haemin has been determined in the temperature range of 0-30 °C. ΔG°, ΔH° and ΔS° of the dissociation are 11.4 kcal/mole, 5.0 kcal/mole and -21 cal/degree per mole, respectively (25 °C). These values are close to the corresponding changes in ferric haemoproteins and differ substantially from those in Fe³⁺. The significance of this result is discussed.

Original language	English
Pages (from-to)	21-29
Number of pages	9
Journal	Biochimica et Biophysica Acta - General Subjects
Volume	273
Issue number	1
DOIs	https://doi.org/10.1016/0304-4165(72)90187-0
State	Published - 26 Jun 1972

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AB - The acid dissociation constant of haemin has been determined in the temperature range of 0-30 °C. ΔG°, ΔH° and ΔS° of the dissociation are 11.4 kcal/mole, 5.0 kcal/mole and -21 cal/degree per mole, respectively (25 °C). These values are close to the corresponding changes in ferric haemoproteins and differ substantially from those in Fe3+. The significance of this result is discussed.

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The acid dissociation of haemin

Abstract

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