Malic enzyme of duck liver is alkylated by bromopyruvate with half-of-the-sites stoichiometry, and with accompanying loss of oxidative decarboxylase and enhancement of pyruvate reductase activities as was previously shown for the pigeon enzyme (Hsu, R.Y. (1982) Mol. Cell. Biochem. 43, 3-26). In the
Three to four families of nuclear genes encode different isoforms of phosphoenolpyruvate (PEP) carboxylase (PEPC): C4-specific, C3 or etiolated, CAM and root forms. C4 leaf PEPC is encoded by a single gene (ppc) in sorghum and maize, but multiple genes in the C4-dicot Flaveria trinervia. Selective
The activity of the enzymes catalyzing the first two steps of sulfate assimilation, ATP sulfurylase and adenosine 5'-phosphosulfate reductase (APR), are confined to bundle sheath cells in several C(4) monocot species. With the aim to analyze the molecular basis of this distribution and to determine
We are interested in the regulatory mechanisms responsible for the mesophyll-specific expression of C4 phosphoenolpyruvate carboxylase (PEPCase). A one-hybrid screen resulted in the cloning of four different members of a novel class of plant homeodomain proteins, which are most likely involved in
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