In a sense, substitution matrices code up chemical properties.
在某种意义上，替换矩阵是对化学属性的编码。
2
In place of combinations of rare-earth compounds, its unique chemical markers are short stretches of DNA, each with different sequence of genetic code.
用特异化学标记的短链DNA取代了混有稀土的复合物，每一个链有不同顺序的基因编码。
3
So, in principle, the protein can record the order of the bases (the chemical “letters” that carry the genetic code) which make up the molecule.