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Soybeans provide an excellent source of protein in animal feed. Soybean protein quality can be enhanced by increasing the concentration of sulfur-containing amino acids. Previous attempts to increase the concentration of sulfur-containing amino acids through the expression of heterologous proteins have met with limited success. Here, we report a successful strategy to increase the cysteine content...
The xylem, in addition to transporting water, nutrients and metabolites, is also involved in long-distance signaling in response to pathogens, symbionts and environmental stresses. Xylem sap has been shown to contain a number of proteins including metabolic enzymes, stress-related proteins, signal transduction proteins and putative transcription factors. Previous studies on xylem sap have mostly utilized...
Physiochemical properties of starch are dependent on several factors including the relative abundance of amylose and amylopectin, and the degree of branching of amylopectin. Utilizing Agrobacterium-mediated transformation, a construct containing the coding region of branching enzyme of Escherichia coli, under transcriptional control of the rice (Oryza sativa L.) starch-branching enzyme promoter was...
A full-length cDNA clone encoding a cytosolic isoform of serine acetyltransferase (SATase; EC 2.3.1.30) was isolated by screening a soybean seedling cDNA library with a 32P-labeled expressed sequence tag. Nucleotide sequence analysis of the isolated cDNA revealed a single open-reading frame of 858base pairs encoding a 30-kDa polypeptide. The deduced amino acid sequence of soybean SATase revealed significant...
The BowmanBirk protease inhibitor (BBI), an abundant soybean [Glycine max (L.) Merr.] seed protein, is a major antinutritional factor. Nulls for the major soybean BBI have been reported in several of the wild perennial Glycine species including G. microphylla (Benth.) Tind PI440956. This perennial Glycine species does not accumulate the major BBI and the molecular basis for the absence of the major...
The sulfur-amino-acid-rich -zeins of maize (Zea mays L.) are represented by 18-kDa and 10-kDa proteins. We have cloned a novel 11-kDa methionine-rich -zein from developing endosperm of the inbred line W23a1. The nucleotide sequence of this new -zein is identical to the published 10-kDa -zein, except for an insertion of 18 nucleotides between +316 and +333bp from the translation start site. Antibodies...
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