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A photoacoustic calorimetric study of horse myoglobin. 1990

J A Westrick, and K S Peters
Department of Chemistry and Biochemistry, University of Colorado, Boulder 80309.

The dynamics of the enthalpy and volume changes for the photodissociation of CO from horse myoglobin has been studied by time-resolved photoacoustic calorimetry which measures the dynamics of enthalpy and volume changes on the nanosecond time scale. The role of the Lys 45 salt bridge in the ligand dissociation is discussed.

UI MeSH Term Description Entries
D008786 Metmyoglobin Myoglobin which is in the oxidized ferric or hemin form. The oxidation causes a change in color from red to brown. Ferrimyoglobin
D009211 Myoglobin A conjugated protein which is the oxygen-transporting pigment of muscle. It is made up of one globin polypeptide chain and one heme group.
D010782 Photolysis Chemical bond cleavage reactions resulting from absorption of radiant energy. Photodegradation
D002151 Calorimetry The measurement of the quantity of heat involved in various processes, such as chemical reactions, changes of state, and formations of solutions, or in the determination of the heat capacities of substances. The fundamental unit of measurement is the joule or the calorie (4.184 joules). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
D006736 Horses Large, hoofed mammals of the family EQUIDAE. Horses are active day and night with most of the day spent seeking and consuming food. Feeding peaks occur in the early morning and late afternoon, and there are several daily periods of rest. Equus caballus,Equus przewalskii,Horse, Domestic,Domestic Horse,Domestic Horses,Horse,Horses, Domestic
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013816 Thermodynamics A rigorously mathematical analysis of energy relationships (heat, work, temperature, and equilibrium). It describes systems whose states are determined by thermal parameters, such as temperature, in addition to mechanical and electromagnetic parameters. (From Hawley's Condensed Chemical Dictionary, 12th ed) Thermodynamic

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