The Korean Journal of Zoology (한국동물학회지)
- Volume 25 Issue 2
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- Pages.63-70
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- 1982
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- 0440-2510(pISSN)
Proteolytic Enzyme in the Midgut during Metamorphosis of Pieris rapae L
배추흰나비의 變態에 EK른 中腸內 蛋白質分解酵素
- Kim, Hak-Ryul (Department of Biology, Korea University) ;
- Yoe, Sung-Moon (Department of Biology, Korea University)
- Published : 1982.04.01
Abstract
The activity, properties, and distribution of midgut protease during metamorphosis in Pieris rapae L. are determined using spectrophotometer, ultracentrifuge and agar gel electrophoresis. Proteolytic activity of midgut reaches the peak just before ecdysis in 5th instar and prepupal stages each but 1 day after ecdysis in pupal stage. Also, optimum pH of midgut protease is pH 8.0 in 5th instar stage, pH 6.5 in prepupal stage, and pH 8.5 immediately before emergence respectively. Protease is found mostly in midght tissue in 5th instar stage but thereafter until just before emergence the enzyme only in lumen contents, suggesting that protease is synthesized in midgut tissue during larval stage and then released into lumen during pupation period.
배추흰나비의 變態에 따른 中腸內 蛋白質分解酵素의 變化, 分布 및 性質을 調査 分析하였다. 中腸內 蛋白質分解酵素는 5齡 幼蟲과 前 期에서 變態直前에 높은 活性이 나타났으나 時期에는 變態後 1日에 가장 높았다. 또한 中腸內의 optimum pH는 5齡 幼蟲에서 pH 8, 前 期에서 pH 6.5, 羽化直後에 pH 8.5로 각각 相異하게 나타났다. 細胞內 酵素 分布는 5齡에서는 주로 中腸의 組織에서 發見되었으나 이후 羽化直前까지는 주로 中腸 內容物에서 發見되었고 中腸 組織에서는 거의 식별할수 없었다. 이러한 結果로 보아 蛋白質分解酵素는 幼蟲期동안 中腸組織에서 合成되였다가 化期에 中腸 內腔으로 放出되는 것 같다.
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