What Was Magical About Stapo Paptites?

i love the idea of a, basically a modulating proteim prote interaction. One of thee things that i remember at millennium, i was a bit frustratd is that there was no way, at a time, that we could block protem proten interaction. So what was amazing about the stapo paptites, which i still think is an amazing technology and grag actually started another company on it called flag.