Avidity研发和销售用于分子连接的分子亲和工具，其的AviTag™技术采用针对性很强的一个*的15氨基酸肽，用来自大肠杆菌的生物素连接酶（BirA）标签上的单一的生物素酶的共轭。

Avidity develops and sells molecular affinity tools for connecting molecules. Our patented AviTag™ technology employs a highly targeted enzymatic conjugation of a single biotin on a unique 15 amino acid peptide tag using the biotin ligase （BirA） from E. coli. AviTag™ sequence is GLNDIFEAQKIEWHE.  Oriented on streptavidin-coated surfaces, this creates an ideal presentation for molecular binding interactions.