• 제목/요약/키워드: HOX

검색결과 66건 처리시간 0.023초

A Probabilistic Approach to the Assessment of Phylogenetic Conservation in Mammalian Hox Gene Clusters

  • Stojanovic, Nikola;Dewar, Ken
    • 한국생물정보학회:학술대회논문집
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    • 한국생물정보시스템생물학회 2005년도 BIOINFO 2005
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    • pp.118-123
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    • 2005
  • With the increasing availability of mammalian genome sequences it became possible to use large scale phylogenetic analysis in order to locate potentially functional regions. In this paper we describe a new probabilistic method for the characterization of phylogenetic conservation in mammalian DNA sequences. We have used this method for the analysis of Hox gene clusters, based on the alignment of 6 species, and we constructed a map of for indicating short and long conserved fragments and their positions with respect to the known locations of Hox genes and other elements, sometimes showing surprising layouts.

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레이저 유도 형광법을 이용한 대류권 HOx(OH, $HO_2$) 라디칼 분석 기술 개발 (Measurement of Tropospheric HOx(OH, $HO_2$) Radicals Radicals by Laser-Induced Fluorescence Technique)

  • 민경은;이호재;박종호;최종호;이미혜
    • 한국대기환경학회:학술대회논문집
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    • 한국대기환경학회 2002년도 추계학술대회 논문집
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    • pp.292-293
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    • 2002
  • 대기 중에서 HOx(OH, H $O_2$) 라디칼은 가장 중요한 산화제로서 광화학 반응의 핵심적 역할을 한다. 이러한 OH 라디칼의 정확한 농도를 측정하기 위한 여러 가지 시도가 있었으나, 그 존재량이 적고 수명이 짧기 때문에 측정에 많은 어려움이 있다. 간접적인 측정에 근거한 모델링과 계산적인 이론 값에 의하면 대류권에서의 전 지구적 평균 OH 라디칼의 농도는 대략 $10^{6}$molecules $cm^{-3}$이고, H $O_2$ 라디칼의 농도는 $10^{8}$molecules $cm^{-3}$정도로 추정된다. (중략)

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지렁이 labial-like유전자의 발현 양상에 관한 연구 (Expression Pattern of labial-like Gene of the Earthworm, Perionyx excavatus)

  • 조성진;이명식;허소영;이종애;박범준;조현주;박순철
    • 한국토양동물학회지
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    • 제7권1_2호
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    • pp.29-34
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    • 2002
  • Hox genes are a family of regulatory gene encoding transcription factor that primarily play a crucial role during development. Several indications suggest their involvement in the control of cell growth and regenration. RT-PCR and souther blot analysis revealed that labial-like gene was increasingly expressed along a spatial gradient in the anterior region of intact worm. During head and tail regeneration, labial-like gene was expressed only in the head region of regenerating body pieces, suggesting that the gene is involved in the anteroposterior patterning in earth-worm. This result could give us information on the significance of Hox genes and the relationship between Hox genes during regeneration.

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Differential Expression of Hox and Notch Genes in Larval and Adult Stages of Echinococcus granulosus

  • Dezaki, Ebrahim Saedi;Yaghoobi, Mohammad Mehdi;Taheri, Elham;Almani, Pooya Ghaseminejad;Tohidi, Farideh;Gottstein, Bruno;Harandi, Majid Fasihi
    • Parasites, Hosts and Diseases
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    • 제54권5호
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    • pp.653-658
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    • 2016
  • This investigation aimed to evaluate the differential expression of HoxB7 and notch genes in different developmental stages of Echinococcus granulosus sensu stricto. The expression of HoxB7 gene was observed at all developmental stages. Nevertheless, significant fold differences in the expression level was documented in the juvenile worm with 3 or more proglottids, the germinal layer from infected sheep, and the adult worm from an experimentally infected dog. The notch gene was expressed at all developmental stages of E. granulosus; however, the fold difference was significantly increased at the microcysts in monophasic culture medium and the germinal layer of infected sheep in comparison with other stages. The findings demonstrated that the 2 aforementioned genes evaluated in the present study were differentially expressed at different developmental stages of the parasite and may contribute to some important biological processes of E. granulosus.

有機溶媒中에서 옥신, 아닐린 및 피라딘을 포함하는 텅스텐錯物의 合成 (A Synthesis of Tungsten Complexes with Oxine, Aniline or Pyridine in Organic Solvent)

  • 박두원;오대섭
    • 대한화학회지
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    • 제19권6호
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    • pp.414-419
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    • 1975
  • 六鹽化 텅스텐(WCl6)을 여러가지 有機溶媒 속에서 리간드로서 옥신과 아닐린 및 피리딘을 각각 반응시켜서 不溶性인 텅스텐 錯化合物을 合成하였다. Dichloromethane과 DMF와 같이 서로 성질이 다른 溶媒속에서의 옥신 錯物을 合成해 보면 溶媒에 따라서 다른 錯物이 生成되었다. 아닐린의 錯物은 dichloromethane溶媒에서 合成되고 피리딘의 錯物은 아세톤溶液에서 合成되었다. 元素分析과 赤外線 스펙트럼 및 熱分析結果 錯化合物들은 組成이$[WCl_2(Hox)_2]와\;[WO_2(Ox)_2],[WCl_3A_3]\;및\;[WO_2ClPy]$임을 알아냈다.

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