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. 1974 Oct;54(4):601–607. doi: 10.1104/pp.54.4.601

Multiple Amine Oxidases in Cucumber Seedlings 1

Frank W Percival a,2, William K Purves a,3
PMCID: PMC367461  PMID: 16658936

Abstract

Cell-free extracts of cucumber (Cucumis sativus L. cv. National Pickling) seedlings were found to have amine oxidase activity when assayed with tryptamine as a substrate. Studies of the effect of lowered pH on the extract indicated that this activity was heterogeneous, and three amine oxidases could be separated by ion exchange chromatography. The partially purified enzymes were tested for their activities with several substrates and for their sensitivities to various amine oxidase inhibitors. One of the enzymes may be a monoamine oxidase, although it is inhibited by some diamine oxidase inhibitors. The other two enzymes have properties more characteristic of the diamine oxidases. The possible relationship of the amine oxidases to indoleacetic acid biosynthesis in cucumber seedlings is discussed.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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