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Assignment of the Fe-Nge(His)stretching mode in the resonance Raman spectra of a monomeric insect cyanomethaemoglobin

Authors
Journal
FEBS Letters
0014-5793
Publisher
Wiley Blackwell (John Wiley & Sons)
Publication Date
Volume
178
Issue
1
Identifiers
DOI: 10.1016/0014-5793(84)81233-8
Keywords
  • Resonance Raman Spectroscopy
  • Cyanomethemoglobin
  • Fe-Ne(His) Stretching
  • Monomeric Hemoglobin

Abstract

Abstract Resonance Raman (RR) spectra of the monomeric cyanomethaemoglobin CTT III from insect larvae of Chironomus thummi thummi are shown for the range of 200–550 cm −1. By iron and cyanide isotope exchange a line varying between 307 cm −1 for 57Fe- 13C 15N and 311 cm −1 for 54Fe- 12C 14N, has been assigned to the Fe-N ϵ stretching mode of this haem complex. The substitution of 54Fe for 57Fe has no effect on the Fe-C = N bending mode whereas it affects the Fe-CN stretching mode.

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