Among 20 basic amino acids, glycine is the only one not exhibiting chirality, and other 19 are all L-amino.
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。
Basic organic (life) chemicals such as amino acids have been detected in nebulae and meteorites (see meteors).
构成生命组织的基本化学物如氨基酸，在星云和陨石中也被发现。
What's more, the amino acids are similar to those found on certain types of meteorites.Which suggests that the basic constituents of life could be widespread in the universe.
更重要的是，在某些陨石上也存在相似的氨基酸，这就是说这些构成生命的基本成分在宇宙中广泛分布。
What's more, the amino acids are similar to those found on certain types of meteorites. Which suggests that the basic constituents of life could be widespread in the universe.
更重要的是，在某些陨石上也存在相似的氨基酸，这就是说这些构成生命的基本成分在宇宙中广泛分布。
The R-groups give the amino acids their physical-chemical characteristics such as polarity (hydrophobic or hydrophilic) and charge (acidic or positive versus basic or negative).
R基团赋予氨基酸物理化学特性，例如极性（亲水性和疏水性）以及电荷（酸性或正电荷，碱性或负电荷）。
Many such amino acids have already been made by adding different chemical groups to the basic amino acid structure.
现在许多的这样的氨基酸都可以通过在基本氨基酸结构上添加化学集团来合成。
Estimating of substitution number of amino acids is basic statistic methods of measuring evolution distance between proteins, which is the base of researching molecular evolution of protein.
氨基酸替代数的估计是测定蛋白质分子间进化距离的基本统计方法，是研究蛋白质分子进化的基础。
These organisms, living in such waters in enormous quantities, contain fatty acids and amino acids which are the basic material of oil formation.
生活在这种环境中的大量浮游生物具有脂肪酸和氨基酸，而这两种物质又是形成石油的基本物质。
Most of the structures that make up animals, plants and microbes are made from three basic classes of molecule: amino acids, carbohydrates and lipids (often called fats).
构成动物、植物和微生物的主要结构是由三个基础种类的分子组成：氨基酸、碳水化合物和脂类(常成为脂肪)。
The amino acids are the basic structural units of biomacromolecules such as protein, enzyme.
氨基酸是蛋白质、酶等生物大分子的基本结构单元。
Acidic, basic, polar, and nonpolar residues, and special properties of specific amino acids.
酸性、碱性、极性与非极性残基，以及特定氨基酸的特殊性质。
Add sulfur amino acids (methionine and cystine), the basic component of hair, to nourish the hair.
添加含硫氨酸(蛋氨酸与胱氨酸)，毛发的基本成分，以滋养被毛。
Add sulfur amino acids (methionine and cystine), the basic component of hair, to nourish the hair.
添加含硫氨酸(蛋氨酸与胱氨酸)，毛发的基本成分，以滋养被毛。
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