203. 大肠杆菌基因密码精简：57个密码子

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这篇报道讨论了科学家如何通过减少其遗传密码中的密码子数量来缩小大肠杆菌的基因组。文章解释了生命DNA中普遍存在的遗传冗余，特别是在64个可能的密码子中，有20个编码氨基酸，3个作为终止信号。此前，科学家已成功将大肠杆菌的基因组从64个密码子缩减到61个（Syn61），使其对病毒产生抵抗力。现在，另一组研究人员通过进行超过101,000次密码子更改，进一步将大肠杆菌的遗传密码缩减到57个密码子，创造了Syn57。尽管Syn57的生长速度比原始菌株慢，但它展示了独特的基因表达，这可能在生物技术和工业应用中实现抗病毒生物体以及具有新特性的蛋白质和聚合物的合成。内容来源：https://phys.org/news/2025-08-scientists-genetic-code-coli-usual.html

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203. 大肠杆菌基因密码精简：57个密码子

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