生命的手征性：从相变到天体生物学
The Chirality Of Life: From Phase Transitions To Astrobiology
摘要：
在宇宙其他地方寻找生命是现代科学中的一个关键问题。然而，要解决生命在宇宙中是否普遍，我们必须首先通过研究地球上生命的起源来了解自然发生的可能性。一个关键的缺失部分是生物分子同手性的起源：渗透到地球上几乎每一种生命形式的是唯一的左旋氨基酸和右旋糖的存在。在这项工作中，我们讨论了最近的研究结果表明，生命的同手性导致连续的手征对称性打破触发的环境事件中的一种机制称为间断的手征。将这些论点应用于其他潜在的生命承载平台对寻找外星生命具有重要意义：我们预测，具有统计代表性的外星立体化学样本平均将是外消旋的。
英文摘要：
The search for life elsewhere in the universe is a pivotal question in modern science. However, to address whether life is common in the universe we must first understand the likelihood of abiogenesis by studying the origin of life on Earth. A key missing piece is the origin of biomolecular homochirality: permeating almost every life-form on Earth is the presence of exclusively levorotary amino acids and dextrorotary sugars. In this work we discuss recent results suggesting that life's homochirality resulted from sequential chiral symmetry breaking triggered by environmental events in a mechanism referred to as punctuated chirality. Applying these arguments to other potentially life-bearing platforms has significant implications for the search for extraterrestrial life: we predict that a statistically representative sampling of extraterrestrial stereochemistry will be racemic on average.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
