Publications by authors named "J L Hedtke"

Article Synopsis
  • - Undergraduate students at UCLA conducted research using RNA interference (RNAi) and fluorescent proteins to pinpoint genes crucial for blood cell development in fruit flies, screening around 3,500 genes and finding 137 that affected hematopoiesis.
  • - By targeting RNAi to different cell types involved in blood cell maturation, the researchers identified specific gene subsets that either facilitate or inhibit this process, revealing new insights into gene functions related to RNA processing and vesicular trafficking.
  • - The CURE (Course-Based Undergraduate Research Experience) model not only enhanced students' understanding and skills in science but also improved retention rates in STEM fields, demonstrating the value of hands-on research in education.
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Cellular proteins are degraded in either proteasomes or lysosomes depending on the types of ubiquitin chains that covalently modify them. It is not known whether the choice between these two pathways is physiologically regulated. The Lys48-polyubiquitin chain is the major signal directing proteins for degradation in proteasomes.

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Acute 96 h bioassays were conducted on coho salmon (Oncorhynchus kisutch) to determine their sensitivity to each of four toxicants during development. Alevins, swim-up fry and juveniles (up to 175 days post-hatch) were exposed to lethal concentrations of copper, zinc, nickel, or pentachlorophenol each week to monitor changes in susceptibility as the fish grew. Fish exhibited a high degree of susceptibility to all of the toxicants during the alevin stage.

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