Yoshio Masui
Yoshio Masui (Japanese増 井 祯 夫, Yoshio Masui; * January 1, 1931 in Kyoto ) is a Japanese / Canadian cell biologist and professor emeritus at the University of Toronto.
Life
Masui earned a bachelor's degree in 1953 and 1955, a master's degree from Kyoto University, in 1961 there just a Ph.D. with a thesis on the effects of lithium ions on the embryogenesis of amphibians. At the Kōnan University in Kobe in 1955 he became assistant in 1958, he took a teaching position as a lecturer ( Koshi ) and 1965 Junior Professorship ( jokyōju, Eng. Assistant Professor ). During a research stay 1966/1967 at Yale University in New Haven, Connecticut, he worked in the laboratory of Clement L. Markert to isoenzymes of lactate dehydrogenase in penguin embryo, before he began new studies on the maturation of frog oocytes. In order to complete this work, he gave up his professorship in Kobe. Masui 1969 became a professor of zoology at the University of Toronto. In 1997, he went into retirement.
Work
Masui discovered in his works of fertilized frog and mouse oocytes to the maturation promoting factor (MPF ) and the Cytostatic factor ( CSF). Both play a central role in initiation of meiosis and mitosis. Their identification and characterization represent the starting point for investigating the regulation of cell division dar.