منابع مشابه
Make junction, will travel
ny cell therapy risks introducing mutated and possibly tumorigenic cells. Now results from Peter Stambrook (University of Cincinnati, Cincinnati, OH) and colleagues underline this concern for embryonic stem (ES) cells, which are one possible source for therapeutic cells. Stambrook constructed a cell line in which he could detect loss or mutation of a heterozygous marker gene. Loss (rather than ...
متن کاملHave tRNA, will travel.
T he processing of tRNA is deceptively complicated from the standpoint of both biochemistry and spatial organization. Every generation in yeast, 3–6 million tRNAs are processed (1), 10 times the number of rRNAs and 60–100 times the number of mRNAs (2). Processing of tRNAs requires 60 polypeptides to catalyze removal of the 5 leader sequence, trimming of the 3 trailer sequence, splicing of the i...
متن کاملHave virus, will travel.
prevent introductions from region to region. Meanwhile, the international community has failed to prevent a stream of species from flowing around the world, with the exception of a 1951 agreement to prevent introductions of plant pests. President Clinton's executive order creates a federal interagency Invasive Species Council whose members include the secretaries of state, treasury, defense, th...
متن کاملEditorial Will ubicomp make GIS invisible ?
While speculating about the future of computers in the 21st century, Mark Weiser argued back in 1991 that ‘‘the most profound technologies are those that disappear. They weave themselves into the fabric of everyday life until they are indistinguishable from it (p. 94).’’ Although the computer as we know it has not vanished as Weiser (1991) predicted, recent advances in ubiquitous computing (ubi...
متن کاملDriverless Cars will Make Rails Obsolete
Driverless vehicles will be common on the road in a short time. They will have many impacts on the global transport market trends. One of the remarkable driverless vehicles impacts will be the laying aside of rail systems, because of several reasons, that is to say traffic congestions will be no more a justification for rail, rail will not be the best answer for disableds, air pollution of cars...
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ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 2002
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb1571rr2