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Oxidation of indole-3-acetic acid to oxindole-3-acetic acid by an enzyme preparation from Zea maysIndole-3-acetic acid is oxidized to oxindole-3-acetic acid by Zea mays tissue extracts. Shoot, root, and endosperm tissues have enzyme activities of 1 to 10 picomoles per hour per milligram protein. The enzyme is heat labile, is soluble, and requires oxygen for activity. Cofactors of mixed function oxygenase, peroxidase, and intermolecular dioxygenase are not stimulatory to enzymic activity. A heat-stable, detergent-extractable component from corn enhances enzyme activity 6- to 10-fold. This is the first demonstration of the in vitro enzymic oxidation of indole-3-acetic acid to oxindole-3-acetic acid in higher plants.
Document ID
20040090131
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Reinecke, D. M.
(Michigan State University East Lansing 48824, United States)
Bandurski, R. S.
Date Acquired
August 21, 2013
Publication Date
January 1, 1988
Publication Information
Publication: Plant physiology
Volume: 86
ISSN: 0032-0889
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: DMB 8504231
CONTRACT_GRANT: NAG2-362
CONTRACT_GRANT: NAGW-97
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Number 40-10
NASA Program Space Biology
NASA Discipline Plant Biology
Non-NASA Center

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