这是因为,按照线性拟合外推的结果仅仅适用于线型构型(均为反式)的碳链。
This is because the linear extrapolation only holds for a chain that adopts a linear (all-trans) configuration.
然后以此空间构型为基础,用“团簇埋入自洽计算法”计算氨基酸在以水分子为外势条件下的电子结构。
Then, based on the structure, the electronic structure of amino acid with the potential of water molecules is calculated using the self-consistent cluster-embedding (SCCE) method.
在传统的20种天然氨基酸中,除没有手性中心的甘氨酸外,其他19种氨基酸均为L构型。
Among 20 basic amino acids, glycine is the only one not exhibiting chirality, and other 19 are all L-amino.
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