serpin family E member 2 PN1 GDN PNI nexin glial-derived nexin 1 serine (or cysteine) proteinase inhibitor, clade E (nexin, plasminogen activator inhibitor type 1), member 2 serpin peptidase inhibitor, clade E (nexin, plasminogen activator inhibitor type 1), member 2 GDNPF PI-7 PI7 PN-1 glia-derived nexin glial-derived neurite promoting factor peptidase inhibitor 7 protease nexin I serpin E2 Glia-derived nexin Peptidase inhibitor 7 Protease nexin 1 Protease nexin I Serpin E2