描述：本品类由xian齐岳shengweu提供！DOTA-PEG-COOH（COOH-PEG-DOTA, Tetraxetan-PEG-Carboxyl）是一种由四氮杂环螯合剂（DOTA）、聚乙二醇（PEG）和羧基（COOH ...

The building blocks of proteins are amino acids, which are small organic molecules that consist of an alpha (central) carbon atom linked to an amino group, a carboxyl group, a hydrogen atom ...

They play a crucial role in the structure, function, and regulation of the body's tissues and organs. Amino acids are characterized by their central carbon atom, known as the α-carbon, which is bonded ...