منابع مشابه
Transient Xist-ence
well as transcript accumulation were qualitatively examined ; (2) nuclear runoff experiments, in which the tran-Howard Hughes Medical Institute scription rate was compared between cells that accu-Department of Cell Biology mulate Xist RNA (such as female somatic cells) and cells Baylor College of Medicine that do not (such as male ES cells); and (3) pulse–chase Houston, Texas 77030 experiments,...
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S ince the birth of Dolly, the first mammal produced from somatic cell nuclear transfer (SCNT), little progress has been made in the efficiency of cloning. Overall, about 0.5–2% of the embryos reconstructed by SCNT develop to term after transfer of reconstructed embryos to recipient females. In PNAS, Matoba et al. (1) report significant improvement in cloning efficiency by manipulation of the l...
متن کاملSeparating k-Separated eNCE Graph Languages
Kim, C. and D.H. Lee, Separating k-separated eNCE graph languages, Theoretical Computer Science 120 (1993) 247-259. An eNCE graph grammar is k-separated (k > 1) if the distance between any two nonterminal nodes in any of its sentential forms is at least k. Let SEP, denote the class of graph languages generated by SEPl (SEP2) is the class of eNCE (boundar E) graph languages, Recently, Engelfriet...
متن کاملEmptiness Problems of eNCE Graph Languages
We consider the complexity of the emptiness problem for various classes of graph languages deened by eNCE (edge label neighborhood controlled embedding) graph grammars. In particular, we show that the emptiness problem is undecidable for general eNCE graph grammars, DEXPTIME-complete for connuent and boundary eNCE graph grammars, PSPACE-complete for linear eNCE graph grammars, NL-complete for d...
متن کاملHigh-fidelity universal quantum gates through quantum interfer- ence
Twisted rapid passage is a type of non-adiabatic rapid passage that gives rise to controllable quantum interference effects that were first observed experimentally in 2003. We show that twisted rapid passage sweeps can be used to implement a universal set of quantum gates that operate with high-fidelity. For each gate in the universal set, sweep parameter values are provided which simulations i...
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ژورنال
عنوان ژورنال: Cell
سال: 1997
ISSN: 0092-8674
DOI: 10.1016/s0092-8674(01)80003-9