báo cáo khoa học: "Search for age-dependent as compared to mutagen-induced mutations on the X-chromosome affecting viability in" pdf

... species. The object of this study is to explore whether mutations on the X-chromosome are accumulating as a result of the process of ageing compared with artificial induction ... segregate together during meiosis. Due to the genetic constitution of the kx-female, male offspring of these females get their X-chromosome from the sire...

Ngày tải lên: 09/08/2014, 22:22

... conjunction with the b domain, to position another metal ion into the more labile site in preparation for donation to another metal-requiring apo-enzyme. A considerable amount of effort has been ... lead- ing to formation of the M 4 a cluster prior to formation of the M 3 b cluster, demonstrating that the individual binding constants of divalent metal ions for the a do...

Ngày tải lên: 19/02/2014, 00:20

... proper subset of the ones mastered passively. The theoretical grammarian has the option to neglect questions of linguistic performance and fully concentrate on the grammar as a correct and ... relaxation, the relaxation level is increased and backtracking to the continuation points is activated. The 2Implicitely the ordered pair <0, c> is part of the contro...

Ngày tải lên: 08/03/2014, 07:20

... doi:10.1111/j.1432-1033.2004.04310.x ity in the assembly of the components required for the function. Cooperative assembly of transcription f actors is expected to show a strong d ependence on small changes in their concentrations ... binding to other GST–p300/ CBP fusions did not exceed 0.5% of input. By contrast, p65 bound strongly to the N-, C1- and C2-regions of p300, an...

Ngày tải lên: 23/03/2014, 13:20

... depolarization to take place. This has been clearly demonstrated [12]. On the basis of the abovementioned arguments and to assess whether the HS is a suitable index of potential performance, the objective ... time) represents the time required for the electric wave to spread and depolarize the ventricular mass. Hence, as the ventricular muscular mass increases, a l...

Ngày tải lên: 07/08/2014, 18:20

... ice front, giving a low TH value. (C) Possible secondary ice binding of type III AFP onto the convex ice front during the annealing period (2–3 h). (D) AFPs bound onto the convex ice front narrow the ... molecules (i.e. the Kelvin effect [24]), such that the TH value reflects the fraction of ice-bound AFPs on the flat ice plane. Indeed, TH increases in proportion with the to...

Ngày tải lên: 07/03/2014, 05:20

... oligomerization. The DNA fragments were cloned in the T4 DNA polymerase blunted PstIsiteof the pSP65 vector. The length of the inserted fragments was estimated on agarose gel and the vector containing ... viral infection is a direct consequence of transcriptional activation [1] and leads to the accumulation of mRNA. In contrast, the shutoff of IFN-b gene expression involve...

Ngày tải lên: 17/03/2014, 10:20

... experiments for each assay condition (standard or supplemented with salts). The LacZ + colonies were produced by the transformation with the origi- nal plasmids, whereas the LacZ ) colonies were the result ... transforming bacteria with the recombinant plasmids. The lacZ ) colonies due to mutations in the lacZ gene made up less than 1% of the total lacZ ) colonies, and...

Ngày tải lên: 29/03/2014, 23:20

... processes of the apo form of the protein (apoNgb) as a result of the formation of an inter- molecular disulfide bond. The preparation of apoNgb was obtained from the corresponding holoprotein by the removal ... simulation, the helical con- formation is preserved, as expected during all simula- tions, because of the additional constraint on the helix provided by the co...

Ngày tải lên: 30/03/2014, 01:20

... in the mid-log phase as well as in the late-log phase. Therefore, the difference in the productivity between the wild-type and K42T systems is not related to the ribosome concentration in the ... addition of various concentrations of streptomycin. In the wild-type system, the productivity was reduced to 50% by the addition of streptomycin up to 0.1 lgÆmL )1 , and...

Ngày tải lên: 30/03/2014, 13:20