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Spring 2018
Acidocin B (AcdB), a bacteriocin from Lactobacillus acidophilus M46 that was initially reported to be a linear peptide, was purified and shown to be circular based on MALDI-TOF MS and MS/MS sequencing. MS analysis further revealed that AcdB is comprised of 58 amino acid residues, instead of 59...
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Structural Studies of Peptides that Influence the Pathogenicity of Bacterial Infections, and Investigation of Structure-Activity-Relationships of Antimicrobial Peptides with Application to Cancer Therapy.
DownloadFall 2017
Enterocin 7 is a two-component, leaderless bacteriocin comprised of an A and B peptide and produced by Enterococcus faecalis 710C. The secondary structure of enterocin 7B was investigated through circular dichroism. A high degree of α-helicity was discovered by circular dichroism, regardless of...
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Expanding the optogenetic toolkit with a photocleavable protein and a near infrared pH indicator
DownloadFall 2017
Optogenetics is an emerging biological technique that is causing a revolution in life science. It uses optical methods to control and visualize genetically targeted biological events in a relatively non-invasive and spatiotemporally precise manner. Optogenetics requires advanced optical...
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Fall 2016
“Blown-pack” spoilage of beef by psychrotrophic Clostridium spp. occurs sporadically and resistance of the endospores to most interventions makes them very difficult to control. Current interventions used to control spoilage and pathogenic bacteria, such as acid washes and heat treatments, do...
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Fall 2016
Fluorescence microscopy is currently the most powerful imaging technique for interrogation of neural circuits. Accordingly, tremendous efforts have been invested in engineering fluorescent proteins (FPs) to act as indicators for various biochemical processes in neural circuits, resulting in a...
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Fall 2015
Contamination by lactic acid bacteria is a major source of inefficiency in the bioethanol industry. Contaminated fermentations exhibit lowered ethanol yields and contamination events often require shutdown of the entire process for cleaning and decontamination. The first objective of this study...
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Fall 2015
The expansion of the fluorescent protein (FP) colour palette through discovery of more species possessing FPs and by subjecting them to intensive protein engineering efforts has greatly aided the effectiveness of FP-based biosensor designs. Currently, the main FP-based methods for detecting...
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Directed Evolution Approaches for Improved Genetically Encoded Fluorescent Calcium Ion and Voltage Indicators
DownloadFall 2014
Fluorescent proteins (FP) have revolutionized our imaging technologies and facilitated visualization of biochemical and physiological processes occurring in complex biological systems, which has opened up a new and unprecedented era in cell biology. Although FPs mainly serve as passive...
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Fall 2014
Paenibacillus polymyxa NRRL B-30509, Paenibacillus terrae NRRL B-30644 and P. polymyxa NRRL B-30507 were found to produce several bacteriocins and non-ribosomal peptides. All three strains produce tridecaptins, non-ribosomal lipopeptides antimicrobially active against food pathogen Campylobacter...
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Fall 2014
The growth of Listeria monocytogenes and spoilage microorganisms is a concern in sodium-reduced ready-to-eat (RTE) meats. To assess the microbial risk of sodium-reduced RTE meats, the microbiota of retail RTE meats was profiled and the growth of L. monocytogenes and an autochthonous microbiota...