Jennifer Stephens

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The manipulation of lignin could, in principle, facilitate efficient biofuel production from plant biomass. Despite intensive study of the lignin pathway, uncertainty exists about the enzyme catalyzing the last step in syringyl (S) monolignol biosynthesis, the reduction of sinapaldehyde to sinapyl alcohol. Traditional schemes of the pathway suggested that(More)
Four experiments were conducted to examine the relationship between antibiotic administration to poultry and the in vivo proliferation of Salmonellae. The frequency of isolation of drug-resistant transconjugant S. arizonae from the livers of chicks inoculated per os with multiply drug-resistant Escherichia coli and drug-sensitive S. arizonae was directly(More)
The glycosidase alpha-amylase is responsible for the hydrolysis of alpha(1-->4) glycosidic linkages found in dietary starch as one means for controlling blood sugar level. The effect of alpha-amylase is detrimental, however, in the disease state diabetes mellitus, where blood glucose levels are elevated due to a biochemical defect. Inhibition of the(More)
In many cereal crops, meiotic crossovers predominantly occur toward the ends of chromosomes and 30 to 50% of genes rarely recombine. This limits the exploitation of genetic variation by plant breeding. Previous reports demonstrate that chiasma frequency can be manipulated in plants by depletion of the synaptonemal complex protein ZIPPER1 (ZYP1) but conflict(More)
1. Human and murine cytosolic epoxide hydrolase were inhibited by thiol-, imidazole- and carboxyl-selective reagents. They were not inhibited by amino-, guanido- or activated serine-selective reagents. 2. Murine, but not human, cytosolic epoxide hydrolase was inhibited by N-bromosuccinimide, a tryptophan selective reagent. 3. Based on sequence data from(More)
While evidence in both sporadic and inherited human colorectal cancer and MIN mice implicate the tumor suppressor gene, APC, in the causation of colorectal carcinogenesis, this gene has not been confirmed to be involved in rodent chemically-induced colon cancer models (RCCM). These experimental models are widely used to elucidate mechanisms involved in(More)
A study was conducted to determine and characterize Salmonella contamination on ready-to-cook broilers or parts in the Columbus, OH, metropolitan area. Ten to twelve samples per store were examined, using a whole-carcass rinse method. The Salmonella cultures isolated were tested for resistance to a series of nine drugs and, subsequently, were sent to the(More)
RNA-directed RNA polymerases (RDRs) play crucial roles in the RNA silencing response of plants by enhancing and maintaining silencing signals. At least two members of the RDR group, namely RDR1 and RDR6, are implicated in defence against plant viruses. RDRs have so far only been characterized in dicot species. In this report, we identified and characterized(More)