These were purified and stuffed with a form of HIV that had been altered to carry a mirror image or "antisense" version of a molecule that enables it to multiply.

这些T助细胞经过纯化，并被注入一种改造过的，带有与原有的控制增殖的分子互为镜像或者说是'反义'的分子。

youdao

And if sense and antisense should meet, the resulting double-stranded molecule no longer works, so the protein the sense strand encodes is not made any more.

ECONOMIST: How to create lots of drugs at once