Biodiversity and the functioning of tropical forests

Sande, Masha T. van der

doi:10.18174/380256

Cited by 7 publications

(15 citation statements)

References 306 publications

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“…In yeast, different deletions of ITS2 have been shown to completely block the formation of mature 26 S rRNA [4]. It is remarkable that the secondary structure proposed for the yeast S. cerevisiue [4,9], with the presence of a giant cross-like structure encompassing the entire ITS2, does not exhibit any obvious similarity with the model shown in Fig. 4.…”

Section: "Cccmentioning

confidence: 95%

“…The detection of definite secondary structure constraints on the variation of trematode ITS2 sequences argues strongly for this region of pre-rRNA to have a significant function if its own as a structured RNA domain, probably in the control of preribosome assembly and rRNA processing. In yeast, different deletions of ITS2 have been shown to completely block the formation of mature 26 S rRNA [4]. It is remarkable that the secondary structure proposed for the yeast S. cerevisiue [4,9], with the presence of a giant cross-like structure encompassing the entire ITS2, does not exhibit any obvious similarity with the model shown in Fig.…”

Section: "Cccmentioning

confidence: 97%

“…Although these transcribed spacer regions are obvious candidates for important roles in the control of ribosome biogenesis, elucidation of their biological function and of the molecular mechanisms involved in their accurate excision still remain a major challenge. Recent functional analyses performed on yeast S. cerevisiae ribosomal RNA genes clearly show that the structural integrity of the transcribed spacer regions is an essential prerequisite for correct processing of mature rRNA and biogenesis of active ribosomal subunits [3,4]. The derivation of reliable secondary structure models for each transcribed spacer region would undoubtedly represent a major step towards a Abbreviations: ITSZ, internal transcribed spacer 2.…”

Section: Introductionmentioning

confidence: 99%

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Conserved secondary structures in the ITS2 of trematode pre‐rRNA

et al. 1993

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Biological functions of transcribed spacer regions in eucaryotic pre-rRNAs remain elusive so far. Utilization of the comparative approach to analyse their secondary structure has been impeded by the extensive sequence divergence observed among most of the specimens available to date. However, we have taken advantage of the recent derivation of a set of largely similar sequences for different schistosome species to look for the presence of constrained secondary structures within the internally transcribed spacer 2 (ITS2). We show that several common features of secondary structure are shared by these species despite sequence variation, with some of them supported by compensatory changes, suggesting a significant role of ITS2 as an RNA domain during ribosome biogenesis.

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Section: "Cccmentioning

confidence: 95%

Section: "Cccmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Conserved secondary structures in the ITS2 of trematode pre‐rRNA

et al. 1993

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“…Transmission electron microscopy has been applied successfully. Materials studied include MgO [ 11, A1,0,, MgAl,O, spinel, BeO, TiO,, Mg,SiO,, NiO, Cu,O, UO,, SiO, [2], olivine [3], ZrO, [4], Sic [5], CuFeS, [6], and yttrium iron garnet (YIG) [7]. However, there are still many important ceramics whose dislocation structures have never or little been studied.…”

Section: Introductionmentioning

confidence: 99%

Electron Microscopy of Dislocation Structures in SrTiO3 Deformed at High Temperatures

Nishigaki

Kuroda

Saka

1991

Phys. Stat. Sol. (a)

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Dislocations in SrTiO3 deformed plastically by indentation at 900 and 1100 °C are studied by comprehensive transmission electron microscopy. At both 900 and 1100°C all the dislocations studied have Burgers vectors of either 〈100〉 or 〈110〉 type. At 900 °C both types of dislocation are in the glide configuration. On the other hand, at 1100°C 〈001〉 dislocations are in the climb configuration, although most of 〈110〉 dislocations are in the glide configuration. Small dislocation loops, both of 〈100〉 and 〈110〉 types, are observed, and most of them are identified as vacancy type.

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“…For the preparation of bis(trans-vinyliodide)s 11 and 13 (Table 2), a variation of Schwartzs hydrozirconation/iodination sequence reported by Jacobsen and co-workers was found to be highly beneficial. [25] The addition of Schwartzs reagent to both alkynes was found to be very fast in dichloromethane and, more importantly, the success of the addition was much less sensitive to the quality of Schwartz reagent. Quenching the reaction mixture with iodine affords very reproducibly high yields of 11 and 13.…”

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confidence: 99%