title: Molecular adaptation of Daphnia magna hemoglobin.
abstract: Daphnia magna responds to changing environmental conditions impeding aerobic metabolism by synthesizing hemoglobin of adequate quantity and quality to maintain oxygen supply of the tissues. Hemoglobin subunit composition and its oxygen affinity were analyzed as a function of temperature as well as depending on the oxygen partial pressure of the medium. Additionally, the time course of acclimation to hypoxia was studied. Correlating structural and functional changes, the role of individual subunits for the increase in oxygen affinity is discussed.
authors.affiliation: Institute of Zoophysiology, Westfälische Wilhelms-Universität, Hindenburgplatz 55, Münster 48143, Germany. zeis@uni-muenster.de
authors.forename: Bettina
authors.initials: B
authors.lastname: Zeis
authors.forename: Tobias
authors.initials: T
authors.lastname: Lamkemeyer
authors.forename: Rüdiger J
authors.initials: RJ
authors.lastname: Paul
mesh_terms: D000064:Acclimatization; D000818:Animals; D003621:Daphnia / Q000502:physiology*; D006454:Hemoglobins / Q000737:chemistry / Q000502:physiology*; D010100:Oxygen / Q000378:metabolism; D021122:Protein Subunits
chemical_list: D006454:Hemoglobins; D021122:Protein Subunits; D010100:Oxygen