Minimal infectious agent - Viroid.
نویسندگان
چکیده
منابع مشابه
ogenicity, viroid evolution, Citrus exocortis viroid, Potato spindle tuber viroid, Peach latent mosaic viroid, Chrysan- themum chlorotic mottle viroid
Viroids are autonomously replicating, small singlestranded circular RNA molecules that do not code for proteins and may cause disease in infected, susceptible plants. Viroids have the ability to induce both RNA-mediated transcriptional gene silencing (TGS) and posttranscriptional gene silencing (PTGS) in infected plants. Viroid PTGS has also been demonstrated in a wheat germ extract system. A p...
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The viroid and viroid-like RNA database is a compilation of all natural sequences published in journals or available from the GenBank and EMBL nucleotide sequence libraries. Several information regarding these RNA species such as the position of their self-catalytic domains and the open reading frame of the human hepatitits delta virus are provided. The database also includes a determination of...
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The ability of the host to detect invasion by a pathogenic intruder and to activate the defence mechanism to eliminate the infection is essential for survival. The host defence system against the invading pathogen is composed from the innate and adaptive immunity. While the adaptive response is based on the recognition of antigen-specific lymphocytes and their clonal selection, the innate immun...
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The Secretary problem is studied with minimal cognitive agents, being a problem that needs memory and judgment. A sequence of values, drawn from an unknown range, is presented; the agent has only one chance to pick a single value as they are presented, and should try to maximize the value chosen. In extension of previous work (Tuci et al. 2002), Continuous Time Recurrent Neural Networks (CTRNN)...
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Research on the so-called “free-energy principle” (FEP) in cognitive neuroscience is becoming increasingly high-profile. To date, introductions to this theory have proved difficult for many readers to follow, but it depends mainly upon two relatively simple ideas: firstly that normative or teleological values can be expressed as probability distributions (active inference), and secondly that ap...
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ژورنال
عنوان ژورنال: Kagaku To Seibutsu
سال: 1987
ISSN: 0453-073X,1883-6852
DOI: 10.1271/kagakutoseibutsu1962.25.154