Vaccinia virus DNA polymerase catalyzes duplex-by-duplex DNA joining reactions in vitro and many features of these recombination reactions are reprised in vivo. This can explain the intimate linkage between virus replication and genetic recombination. However, it is unclear why these apparently ordinary polymerases exhibit this unusual catalytic capacity. In this study, we have used different s...

In this study, arc and friction stir hybrid welding (AFSHW) was proposed to weld aluminum-steel dissimilar metals in attempt realize high quality joining. Firstly, an interlayer produced on galvanized steel by using bypass current-metal inert gas (BC-MIG), then aluminium plate jointed via Friction lap (FSLW). The effects of tool pin length FSLW times the microstructure mechanical properties joi...

Tetraparental (allophenic) mice, made chimeric at the eight-cell stage by joining two embryos from histoincompatible parental strains, were examined by a microcytotoxicity test. The results indicate that parental-strain fibroblasts are more effectively destroyed in vitro by lymph node cells from the tetraparental mice than by lymph node cells from the F(1) hybrid or either parental stain. The d...

In this paper, a hybrid overlay/underlay cognitive radio system is modeled as an M/M/1 queue where the rate of arrival and the service capacity are subject to Poisson alternations. Each packet as a customer arriving at the queue makes a decision to join the queue or not. Upon arrival, the individual decision of each packet is optimized based on his observation about the queue length and the sta...

We have analyzed the molecular features of a t(ll;14)(q23;q32) chro mosome translocation of a cell line established from a B-cell lymphoma. Somatic hybrid cells carrying the llq— and/or 14q+ chromosome(s) were produced in order to map the breakpoints. Southern blot analyses of DNAs from these hybrid cell lines together with various probes from the IGH locus on chromosome 14 and the ETS-l and ...

It has been demonstrated that structural genes in eukaryotes contain intervening sequences (introns) which are absent from expressed sequences (exons) [l-6]. There is evidence that intervening sequences are transcribed [7], but subsequently the introns are removed by a process which is now known as RNA splicing [ 8,9]. RNA splicing must be a very precise process since it results in the joining ...

Twenty-five microsatellite markers uniquely differentiated 35 avocado cultivars and two wild relatives. Average heterozygosity was high (60.7%), ranging from 32% in P. steyermarkii to 84% in Fuerte and Bacon. In a subset of 15 cultivars, heterozygosity averaged 63.5% for microsatellites, compared to 41.8% for restriction fragment length polymorphisms (RFLPs). A neighbor-joining tree, according ...