2025 biology talkshow : DNA連接酶-生命故事的縫合師 (選修生物I)

解釋 DNA 連接酶在生命活動中的關鍵作用，將其比作「生命裁縫師」或「縫合師」。詳述該酶如何修復 DNA 骨架斷口，將 3'-羥基與 5'-磷酸基連接起來形成 磷酸二酯鍵。進一步闡釋連接酶在 DNA 複製中拼接岡崎片段、在 DNA 修復中彌補斷裂，以及在 分子生物學實驗中重組基因片段的三大應用情境。還介紹不同種類的連接酶，如人體內的 DNA ligase I、III、IV，以及實驗室常用的 T4 DNA ligase 和耐高溫的 Ampligase，並解釋黏性端和 平端在連接過程中的差異。總體而言，強調 DNA 連接酶對於維持遺傳信息完整性和生命正常運作的不可或缺性。 Powered by Firstory Hosting

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2025 biology talkshow : DNA連接酶-生命故事的縫合師 (選修生物I)

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