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[求助]
鹽離子如何影響DNA和蛋白質(zhì)
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本人非生物專業(yè),想請(qǐng)教兩個(gè)問題: 1. 請(qǐng)問NDA的A, B, Z三種結(jié)構(gòu)是不是受鹽離子的調(diào)控? 2. 鹽對(duì)DNA或者蛋白質(zhì)的構(gòu)象和功能,大致有什么影響,能否大致分一下類? 最好給些綜述文獻(xiàn)。非常謝謝! |

專家顧問 (正式寫手)
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專家經(jīng)驗(yàn): +21 |

專家顧問 (正式寫手)
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專家經(jīng)驗(yàn): +21 |
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Form A :right handed double helix Most RNA present in this form Major conformation of RNA the most favorable conformation at low concentration of water Bases are displaced away from the axis Major groove is narrow while minor groove is wide Over all shape short and wide Form B : Right handed double helix the most common type of DNA Major conformation of DNA the most favorable conformation at high concentration of water Bases are perpendicular to the axis Major groove is wide while minor groove is narrow Over all shape is long and narrow Form z : Left handed double helix Zigzag form Minor conformation of DNA the most favorable conformation at high concentration of salt Bases are perpendicular to the axis Both major and minor groove are narrow Over all shape is elongate and narrow |


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