Z-APF-CMK is a specific inhibitor of Ca2+-regulated nuclear scaffold protease (CRNSP)[1].
References
[1] Zhang D, et al. Granzymes A and B directly cleave lamins and disrupt the nuclear lamina during granule-mediated cytolysis. Proc Natl Acad Sci U S A. 2001 May 8;98(10):5746-51. DOI:10.1073/pnas.101329598