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tag transcriptional regulation cell molecular biology microbiology immunology

Individual bacterial transcriptomes each plotted as a single point create a ring-shaped structure.
Rapidly Dividing Bacteria Coordinate Gene Expression and Replication
Kamal Nahas, PhD | Mar 15, 2024 | 4 min read
E. coli divides faster than it can replicate its genome, while simultaneously expressing its genes. Scientists recently revealed the intricate molecular coordination that makes this possible.
Microscopic image of a live amoeba.
Illuminating Specimens Through Live Cell Imaging
Charlene Lancaster, PhD | Mar 14, 2024 | 8 min read
Live cell imaging is a powerful microscopy technique employed by scientists to monitor molecular processes and cellular behavior in real time.
Collage of images including sperm, bacteria, coral, and an illustration of a researcher
Our Favorite Cell and Molecular Biology Stories of 2021
Jef Akst | Dec 2, 2021 | 3 min read
Beyond The Scientist’s coverage of COVID-19’s molecular underpinnings were many other stories highlighting the advances made in scientists’ understanding of the biology of cells.
A person moving the hands of a vintage clock backwards.
Synthetic Circuits Reveal the Key to Rewinding the Cellular Clock
Charlene Lancaster, PhD | Mar 12, 2024 | 4 min read
Using a circuit-based system, scientists determined the ideal transcription factor levels to promote the successful reprogramming of fibroblasts into induced pluripotent stem cells.
Molecular Biology
The Scientist Staff | Sep 1, 1991 | 1 min read
S. Ghosh, D. Baltimore, "Activation in vitro of NF-kB by phosphorylation of its inhibitor IkB," Nature, 344:678-82, 1990. Sankar Ghosh (Whitehead Institute for Biomedical Research, Cambridge, Mass.): "This paper brings together two areas of rapidly moving research: the role of protein phosphorylation and control of transcriptional regulation. The inhibitor IkB not only keeps the transcription factor NF-kB in the cytoplasm--away from DNA--but also directly prevents it from binding to DNA. By sh
Bugs as Drugs to Boost Cancer Therapy
Danielle Gerhard, PhD | Jan 18, 2024 | 7 min read
Bioengineered bacteria sneak past solid tumor defenses to guide CAR T cells’ attacks.
Microbiology
The Scientist Staff | May 12, 1991 | 1 min read
J.B. Stock, A.J. Ninfa, A.M. Stock, "Protein phosphorylation and regulation of adaptive responses in bacteria," Microbiological Reviews, 53:450-90, 1989. Jeff Stock (Princeton University, Princeton, N.J.): "Although research on signal transduction has traditionally focused on eukaryotic cells, prokaryotes also respond to environmental signals. Recent studies, reviewed in this article, show that a single bacterial cell such as Escherichia coli may have as many as 50 different receptor kinases a
Artist’s rendition of red SARS-CoV-2 coronaviruses floating near blue strands of DNA.
COVID-19 Infections May Reshape Genetic Landscape
Holly Barker, PhD | Mar 30, 2023 | 3 min read
SARS-CoV-2 infection triggers structural changes in the host cell’s DNA, which provide a molecular explanation for long COVID, a new study suggests. 
One Protein to Rule Them All
Shelby Bradford, PhD | Feb 28, 2024 | 10+ min read
p53 is possibly the most important protein for maintaining cellular function. Losing it is synonymous with cancer.
Immunology
The Scientist Staff | Feb 3, 1991 | 1 min read
J.J. Siekierka, S.H.Y. Hung, M. Poe, C.S. Lin, N.H. Sigal, "A cytosolic binding protein for the immunosuppressant FK-506 has peptidyl-prolyl isomerase activity but is distinct from cyclophilin," Nature, 341, 755-7, 26 October 1989. John J. Siekierka (Merck Sharp & Dohme Research Laboratories, Rahway, N.J.): "Two clinically important immunosuppressant drugs, cyclosporin A (CsA) and FK-506, are valuable probes for studying the molecular mechanisms of T cell activation. Although chemically uniqu

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