Fig. 1
From: Supramolecular attack particle: the way cytotoxic T lymphocytes kill target cells
The cytotoxic substances in CTL, perforin, and granzyme, assembled into supramolecular attack particles (SMAPs), which were released toward and remained attached to the target cell membrane after the CTL removal. SMAPs, ~120 nm in diameter, have a dense shell that includes TSP-1 and a core of perforin, granzymes, and other cytotoxic proteins
