• 제목/요약/키워드: Homologue

검색결과 222건 처리시간 0.034초

그람 양성균인 Bacillus subtilis와 그람 음성균인 escherichia coli에서 protein secretion에 중요 역할을 하는 secY에 대한 비교 연구 (A comparative study of the major component of the protein secretion machinery, secY, in gram positive bacillus subtilis and gram negative escherichia coli.)

  • 서주원
    • 미생물과산업
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    • 제17권1호
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    • pp.10-18
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    • 1991
  • A phylogenetic comparison of homologous protein can often supplement genetic and biochemical analysis by revealing conserved structures that are critical for function(Waugh et al., 1989). I therefore isolated a secY homologue from B. subtilis, a gram positive bacterium evolutionary distant from E. coli. The comparison and interplay between these two bacterial systems should contribute greatly to our understanding of the functions and interactions within systems evolved for protein translocation in both prokaryotic and eukaryotic organisms.

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Homologue Patterns of Polychlorinated Naphthalenes (PCNs) formed via Chlorination in Thermal Process

  • Ryu, Jae-Yong;Kim, Do-Hyong;Mulholland, James A.;Jang, Seong-Ho;Choi, Chang-Yong;Kim, Jong-Bum
    • 한국환경과학회지
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    • 제21권8호
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    • pp.891-899
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    • 2012
  • The chlorination pattern of naphthalene vapor when passed through a 1 cm particle bed of 0.5% (mass) copper (II) chloride ($CuCl_2$) mixed with silicon dioxide ($SiO_2$) was studied. Gas streams consisting of 92% (molar) $N_2$, 8% $O_2$ and 0.1% naphthalene vapor were introduced to an isothermal flow reactor containing the $CuCl_2/SiO_2$ particle bed. Chlorination of naphthalene was studied from 100 to $400^{\circ}C$ at a gas velocity of 2.7 cm/s. Mono through hexachlorinated naphthalene congeners were observed at $250^{\circ}C$ whereas a broader distribution of polychlorinated naphthalenes (PCNs) including hepta and octachlorinated naphthalenes was observed at $300^{\circ}C$. PCN production was peak at $250^{\circ}C$ with 3.07% (molar) yield, and monochloronaphthalene (MCN) congeners were the major products at two different temperatures. In order to assess the effect of a residence time on naphthalene chlorination, an experiment was also conducted at $300^{\circ}C$ with a gas velocity of 0.32 cm/s. The degree of naphthalene chlorination increased as a gas velocity decreased.