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tag recombination microbiology evolution developmental biology

An illustration of green bacteria floating above neutral-colored intestinal villi
The Inside Guide: The Gut Microbiome’s Role in Host Evolution
Catherine Offord | Jul 1, 2021 | 10+ min read
Bacteria that live in the digestive tracts of animals may influence the adaptive trajectories of their hosts.
Researchers in George Church&rsquo;s lab modified wild type ADK proteins (left) in <em >E.coli</em>, furnishing them with an nonstandard amino acid (nsAA) meant to biocontain the resulting bacterial strain.
A Pioneer of The Multiplex Frontier
Rashmi Shivni, Drug Discovery News | May 20, 2023 | 10 min read
George Church is at it again, this time using multiplex gene editing to create virus-proof cells, improve organ transplant success, and protect elephants.
Human Pluripotent Cells Pass Safety Test
Douglas Steinberg | Sep 1, 2002 | 7 min read
Image: ©2001 MacMillan Publishers Ltd.  PLURIPOTENT-CELL PIPELINE: To obtain embryonic germ cells, researchers culture primordial germ cells (PGCs) dissected from the genital ridge. If left in situ, a PGC develops into spermatozoa or ova after its imprints have been erased and reestablished. Embryonic stem cells come from the blastocyst's inner cell mass. (Reprinted with permission, Nature 414:122-8, 2001) Because the science is hard and the politics mean, progress in understanding
AIDS Pandemic Provokes Alarming Reassessments Of Infectious Disease
Joshua Lederberg | Jul 11, 1993 | 5 min read
In 1900, infectious disease was the leading cause of mortality in the United States, accounting for at least 37 percent of deaths. By 1950, this had been mitigated to 6.8 percent and, by 1989, to 2.8 percent, with corresponding improvements in life expectancy. These numbers, of course, must be taken with a grain of salt, given the eventual preemptive role of infection in chronic illness, and many disorders whose infectious etiology is still to be recognized. Further, the relative importance
Genetic Parasites and a Whole Lot More
Barry Palevitz | Oct 15, 2000 | 10+ min read
Photo: Ori Fragman, Hebrew University Hordeum spontaneum, the plant studied for BARE-1 retroelements. With genome sequences arriving almost as regularly as the morning paper, the public's attention is focused on genes--new genes to protect crops against pests; rogue genes that make bacteria resistant to antibiotics; faulty genes that, if fixed, could cure diseases such as muscular dystrophy. What many people don't realize is that genes account for only part of an organism's DNA, and in many c
Epigenetics: Genome, Meet Your Environment
Leslie Pray | Jul 4, 2004 | 10+ min read
©Mehau Kulyk/Photo Researchers, IncToward the end of World War II, a German-imposed food embargo in western Holland – a densely populated area already suffering from scarce food supplies, ruined agricultural lands, and the onset of an unusually harsh winter – led to the death by starvation of some 30,000 people. Detailed birth records collected during that so-called Dutch Hunger Winter have provided scientists with useful data for analyzing the long-term health effects of prenat
Articles Alert
The Scientist Staff | Aug 7, 1988 | 8 min read
The Scientist has asked a group of experts to periodically comment upon recent articles that they have found noteworthy. Their selections, presented here in every issue, we neither endorsements of content nor the result of systematic searching. Rather, they are personal choices of articles they believe the scientific community as a whole may also find interesting. Reprints of any articles cited here may be ordered through The Genuine Article 3501 Market St., Philadelphia, Pa. 19104, or by telep

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