Overgrowth stimulating factor released from Rous sarcoma cells   总被引：5，自引：0，他引：5  

H Rubin 《Science (New York, N.Y.)》1970,167(922):1271-1272

An assay is described for a nonzviral factor from the medium of Rous sarcoma cells which stimulates rapid and sustained cellular overgrawth in crowded chick embryo cultures. The factor is nondialyzable and thermnolabile and is released in large amounts several days after the first visible transformation of newly infected chick embryo cells.  相似文献   

Synthesis of nonribosomal RNA by lymphocytes: a response to phytohemagglutinin treatment   总被引：8，自引：0，他引：8  

H L Cooper  A D Rubin 《Science (New York, N.Y.)》1966,152(721):516-518

When lymphocytes are stimulated to enlarge and divide by treatment with phytohemagglutinin, most of the rapidly synthesized RNA is nonribosomal. The phenomenon is a response by lymphocytes to stimulation by phytohemagglutinin, rather than a general concomitant of lymphocyte growth.  相似文献   

Collagen gels: design for a vitreous replace- ment     

K H Stenzel  M W Dunn  A L Rubin  T Miyata 《Science (New York, N.Y.)》1969,164(885):1282-1283

Clear, stable gels have been prepared from purified tropocollagen from calf skin; the collagen was solubilized with a proteolytic enzyme (Proctase) and stabilized by ultraviolet irradiation under nitrogen. These gels are clear, possess altered immunologic reactivity, and have properties of an ideal vitreous replacement. Implantations in rabbit and monkey eyes appear to be well tolerated, remain clear, and gradually disappear in about 2 months.  相似文献   

Metagenomic discovery of biomass-degrading genes and genomes from cow rumen     

Hess M  Sczyrba A  Egan R  Kim TW  Chokhawala H  Schroth G  Luo S  Clark DS  Chen F  Zhang T  Mackie RI  Pennacchio LA  Tringe SG  Visel A  Woyke T  Wang Z  Rubin EM 《Science (New York, N.Y.)》2011,331(6016):463-467

The paucity of enzymes that efficiently deconstruct plant polysaccharides represents a major bottleneck for industrial-scale conversion of cellulosic biomass into biofuels. Cow rumen microbes specialize in degradation of cellulosic plant material, but most members of this complex community resist cultivation. To characterize biomass-degrading genes and genomes, we sequenced and analyzed 268 gigabases of metagenomic DNA from microbes adherent to plant fiber incubated in cow rumen. From these data, we identified 27,755 putative carbohydrate-active genes and expressed 90 candidate proteins, of which 57% were enzymatically active against cellulosic substrates. We also assembled 15 uncultured microbial genomes, which were validated by complementary methods including single-cell genome sequencing. These data sets provide a substantially expanded catalog of genes and genomes participating in the deconstruction of cellulosic biomass.  相似文献   

Deep layer of sediments in alpine lake in the tropical mid-pacific     

Woodcock AH  Rubin M  Duce RA 《Science (New York, N.Y.)》1966,154(3749):647-648

Sediments from a unique high-altitude lake on Hawaii indicate ash falls and other airborne and waterborne materials for a period estimated to extend into the Pleistocene.  相似文献   

Genomic sequencing of Pleistocene cave bears     

Noonan JP  Hofreiter M  Smith D  Priest JR  Rohland N  Rabeder G  Krause J  Detter JC  Pääbo S  Rubin EM 《Science (New York, N.Y.)》2005,309(5734):597-599

Despite the greater information content of genomic DNA, ancient DNA studies have largely been limited to the amplification of mitochondrial sequences. Here we describe metagenomic libraries constructed with unamplified DNA extracted from skeletal remains of two 40,000-year-old extinct cave bears. Analysis of approximately 1 megabase of sequence from each library showed that despite significant microbial contamination, 5.8 and 1.1% of clones contained cave bear inserts, yielding 26,861 base pairs of cave bear genome sequence. Comparison of cave bear and modern bear sequences revealed the evolutionary relationship of these lineages. The metagenomic approach used here establishes the feasibility of ancient DNA genome sequencing programs.  相似文献   

Phylogenetic shadowing of primate sequences to find functional regions of the human genome     

Boffelli D  McAuliffe J  Ovcharenko D  Lewis KD  Ovcharenko I  Pachter L  Rubin EM 《Science (New York, N.Y.)》2003,299(5611):1391-1394

Nonhuman primates represent the most relevant model organisms to understand the biology of Homo sapiens. The recent divergence and associated overall sequence conservation between individual members of this taxon have nonetheless largely precluded the use of primates in comparative sequence studies. We used sequence comparisons of an extensive set of Old World and New World monkeys and hominoids to identify functional regions in the human genome. Analysis of these data enabled the discovery of primate-specific gene regulatory elements and the demarcation of the exons of multiple genes. Much of the information content of the comprehensive primate sequence comparisons could be captured with a small subset of phylogenetically close primates. These results demonstrate the utility of intraprimate sequence comparisons to discover common mammalian as well as primate-specific functional elements in the human genome, which are unattainable through the evaluation of more evolutionarily distant species.  相似文献   

Evidence of strong earthquake shaking in the lower wabash valley from prehistoric liquefaction features     

Obermeier SF  Bleuer NR  Munson CA  Munson PJ  Martin WS  McWilliams KM  Tabaczynski DA  Odum JK  Rubin M  Eggert DL 《Science (New York, N.Y.)》1991,251(4997):1061-1063

Earthquake-induced liquefaction features in Holocene sediments provide evidence of strong prehistoric shaking, magnitude m(b) 6.2 to 6.7, in the Wabash Valley bordering Indiana and Illinois. The source of the one or more earthquakes responsible was almost certainly in or near the Wabash Valley. The largest event is interpreted to have occurred between 7500 and 1500 years ago on the basis of archeological, pedological, and stratigraphic relations.  相似文献   

A BAC-based physical map of the major autosomes of Drosophila melanogaster     

Hoskins RA  Nelson CR  Berman BP  Laverty TR  George RA  Ciesiolka L  Naeemuddin M  Arenson AD  Durbin J  David RG  Tabor PE  Bailey MR  DeShazo DR  Catanese J  Mammoser A  Osoegawa K  de Jong PJ  Celniker SE  Gibbs RA  Rubin GM  Scherer SE 《Science (New York, N.Y.)》2000,287(5461):2271-2274

We constructed a bacterial artificial chromosome (BAC)-based physical map of chromosomes 2 and 3 of Drosophila melanogaster, which constitute 81% of the genome. Sequence tagged site (STS) content, restriction fingerprinting, and polytene chromosome in situ hybridization approaches were integrated to produce a map spanning the euchromatin. Three of five remaining gaps are in repeat-rich regions near the centromeres. A tiling path of clones spanning this map and STS maps of chromosomes X and 4 was sequenced to low coverage; the maps and tiling path sequence were used to support and verify the whole-genome sequence assembly, and tiling path BACs were used as templates in sequence finishing.  相似文献   

SYNTHESES OF MODEL UNSATURATED LACTONES RELATED TO THE CARDIAC AGLYCONES     

Fried J  Rubin M  Paist WD  Elderfield RC 《Science (New York, N.Y.)》1940,91(2366):435-436

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