Journal of Ecosystem & Ecography

ISSN: 2157-7625

Journal of Ecosystem & Ecography

Species Rarity

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Species Rarity

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A species is rare because it has relatively few individuals; it is very uncommon or scarce. Rarity is a relative concept and is related to the physical size of the individuals as well as the pattern of their distribution. A species may be rare because it has a limited range, existing only in certain patches of habitat scattered across an area -- common in those locations but rare in the overall scheme of things.species abundances is so regularly observed among different taxonomic sets in geographically diverse systems is a question that has received considerable theoretical and empirical investigation.

Related Journals of Species Rarity

Journal of Aquaculture Research & Development, Journal of Biodiversity & Endangered Species, Journal of Earth Science & Climatic Change, Journal of Fisheries & Livestock Production, Poultry, Fisheries & Wildlife Sciences , Mammalian Species, Plant Species Biology, Marine Fisheries Review, Marine Mammal Science, Marine Pollution Bulletin, New Zealand Journal of Marine and Freshwater Research, Russian Journal of Marine Biology.

Species Rarity

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  • K Mulkijanyan
    Plant biopolymers from Boraginaceae family species and their synthetic derivatives: Prospective pharmacological agents
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  • Yosef Yarden
    Classically, the 3’untranslated region (3’UTR) is that region in eukaryotic protein-coding genes from the translation termination codon to the polyA signal. It is transcribed as an integral part of the mRNA encoded by the gene. However, there exists another kind of RNA, which consists of the 3’UTR alone, without all other elements in mRNA such as 5’UTR and coding region. The importance of independent 3’UTR RNA (referred as I3’UTR) was prompted by results of artificially introducing such RNA species into malignant mammalian cells. Since 1991, we found that the middle part of the 3’UTR of the human nuclear factor for interleukin-6 (NF-IL6) or C/EBP gene exerted tumor suppression effect in vivo. Our subsequent studies showed that transfection of C/EBP 3’UTR led to down-regulation of several genes favorable for malignancy and to up-regulation of some genes favorable for phenotypic reversion. Also, it was shown that the sequences near the termini of the C/EBP 3’UTR were important for its tumor suppression activity. Then, the C/EBP 3’UTR was found to directly inhibit the phosphorylation activity of protein kinase CPKC in SMMC-7721, a hepatocarcinoma cell line. Recently, an AU-rich region in the C/EBP 3’UTR was found also to be responsible for its tumor suppression. Recently we have also found evidence that the independent C/EBP 3’UTR RNA is actually exists in human tissues, such as fetal liver and heart, pregnant uterus, senescent fibroblasts etc. Through 1990’s to 2000’s, world scientists found several 3’UTR RNAs that functioned as artificial independent RNAs in cancer cells and resulted in tumor suppression. Interestingly, majority of genes for these RNAs have promoter-like structures in their 3’UTR regions, although the existence of their transcribed products as independent 3’UTR RNAs is still to be confirmed. Our studies indicate that the independent 3’UTR RNA is a novel non-coding RNA species whose function should be the regulation not of the expression of their original mRNA, but of some essential life activities of the cell as a whole.
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  • Chioma Nwakanma
    FISH SPECIES IDENTIFICATION AND BIODIVERSIFICATION IN ENUGU METROPOLIS RIVER BY DNA BARCODING
    PPT Version | PDF Version
  • Paul W Sammarco
    Geomorphological relief on mesophotic banks of the northern Gulf of Mexico, including geographic patterns and relationship to benthic species diversity
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  • Ballagere Puttaraju Harini
    Distribution and divergence of few common termites species: A study at Jnanabharathi
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  • Anna Lange-Consiglio
    AMNIOTIC DERIVED PROGENITOR CELLS IN DIFFERENT ANIMAL SPECIES IN VIEW OF CELL THERAPY APPLICATIONS
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  • Iqbal Parwez
    Genetic diversity and molecular declining population of four Channid species from North India and possible strategies
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  • V.Barbakadze
    Novel biologically active caffeic acid-derived biopolymer from different species of Boraginaceae family with potential therapeutic effect
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  • Maria Teresa Mascellino
    Candida bloodstream infections: species distribution and antifungal resistance in General Medicine wards and in Intensive Care Units (ICUs)
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