例文
- The bacteriophage T12 integrates into S . pyogenes chromosome by site-specific recombination into the anticodon loop of a gene that codes for serine tRNA . The bacterial attachment site ( attB ) has a 96 base pair sequence homologous to the phage attachment site and is located at the 3 end of the tRNA gene such that the coding sequence of the tRNA gene remains intact after integration of the prophage.