Publication Date


Document Type


First Advisor

Baker, Gary M.

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Chemistry


Cytochrome oxidase


Acid-resistant and -sensitive conformers of cytochrome c oxidase are observed by varying the amount of dodecyl maltoside in the enzyme solution. Acid-resistance was evident only when the enzyme solution contained a low concentration of dodecyl maltoside (400 mol / mol heme A). Increasing the amount of the detergent by 20-fold converted the resistant to the sensitive conformer. Similar conditions have been reported to promote dissociation of subunits HI, Via, VIb and Vila. SDS-PAGE analysis, however, indicated that the conversion from the resistant to the sensitive conformer did not require the dissociation of these subunits. The acid-sensitive conformer was observed in the presence and absence of subunits III, Via, VIb and Vila. Additionally, the resistant conformer was observed under conditions where these subunits were removed. The possibility that the induction of the sensitive conformer is a direct effect on the catalytic core complex will be discussed.


Includes bibliographical references (pages [51]-52)


iv, 56 pages




Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type