entry of viral genome into host nucleus via retainment of capsid in nuclear pore complex and release of genome into nucleoplasm entry of viral genome into host nucleus via attachment of capsid to nuclear pore complex and release of genome into nucleoplasm 2011-07-26T04:56:10Z jl This mechanism is used by viruses such as Hepadnaviridae whose capsids enter the NPC but are too big to pass intact into the nucleus. GO:0075508 biological_process Viral penetration into the host nucleus where a viral capsid enters the host nuclear pore complex (NPC) but remains attached to the pore on the nuclear side. The capsid then disassembles, releasing the viral genome into the nucleoplasm. viral penetration into host nucleus