Direct electrochemical characterization of Vitreoscilla sp. hemoglobin entrapped in organic films

Chunhai Fan, Jun Zhong, Rong Guan, Genxi Li

Research output: Contribution to journalArticlepeer-review

Abstract

The redox properties of a prokaryotic, Vitreoscilla sp. hemoglobin (VHb) in fuzzy organic films are studied with electrochemistry. This VHb exhibits irreversible electrochemical response at bare pyrolytic graphite (PG) electrode surfaces. However, upon being entrapped in organic films, the heterogeneous electron transfer rate of VHb will be sufficiently high to produce a quasi-reversible electrochemical response. The observation of electrocatalysis (reduction of O2) by hemes suggests that the protein can retain its biological activity under these conditions.

Keywords

  • Vitreoscilla sp. hemoglobin (VHb)

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biophysics
  • Biochemistry
  • Molecular Biology

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