FIG. 1.
Rhizobitoxine inhibition of enzymes involved in the pathway of ethylene biosynthesis and two enzymatic assay systems for rhizobitoxine. The new ACC synthase assay is based on the inhibition of ACC synthase (tomato bLE-ACS2 expressed in E. coli) by rhizobitoxine. The β-cystathionase assay was reported previously by Ruan and Peters (18). DNPH, 2,4-dinitrophenylhydrazine.