Subcellular Localization of Asparaginase and Asparagine Aminotransferase in Pisum sativum Leaves | Zendy

Robert J. Ireland | Zendy; Kenneth W. Joy | Zendy

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Subcellular Localization of Asparaginase and Asparagine Aminotransferase in Pisum sativum Leaves

Author(s) -

Robert J. Ireland,

Kenneth W. Joy

Publication year - 1983

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.72.4.1127

Subject(s) - pisum , sativum , asparagine , transamination , biochemistry , biology , asparagine synthetase , sucrose , asparaginase , differential centrifugation , glyoxylate cycle , cytosol , botany , enzyme , genetics , lymphoblastic leukemia , leukemia

Protoplasts isolated from young and mature pea leaves (Pisum sativum L.) were broken and their contents fractionated by differential centrifugation or on sucrose-density gradients. Asparaginase was found only in the cytosol of young leaves. Asparagine aminotransferase was found in both young and mature leaves and was localized exclusively in the peroxisome. This corroborates the observation that asparagine transamination is catalyzed by the serine:glyoxylate aminotransferase.

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