beta-Cystathionase In Vivo Inactivation by Rhizobitoxine and Role of the Enzyme in Methionine Biosynthesis in Corn Seedlings |
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| Authors: | Giovanelli J Owens L D Mudd S H |
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| Affiliation: | Laboratory of General and Comparative Biochemistry, National Institutes of Mental Health, Bethesda, Maryland 20014. |
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| Abstract: | Rhizobitoxine has previously been shown to inactivate irreversibly β-cystathionase isolated from spinach. In the present studies, rhizobitoxine was shown to inhibit partially β-cystathionase of spinach and corn seedlings in vivo. An activity of 30 to 40% of normal remained in toxin-treated seedlings of both spinach and corn. Possible reasons for the partial inhibition are discussed. |
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