I remember seeing an advertisement of this kit and have been trying to find it again with no success.

The principle of the kit is using two epitope on the same protein and have two specific antibodies to it. The secondary antibodies that recognize these two primary antibodies have separate "something" that can be reconstituted only when two antibodies came close enough.

So it is like FRET, BiFC or split luciferase on immunoblot.

I'd appreciate if anybody can find the product info.

Thanks.