Long, dynamic tubular channels, formed by invagination of the nuclear envelope, that extend deep into the nucleoplasm. The channels have an underlying lamina and are implicated in functioning in signaling and transport. [ http://www.ncbi.nlm.nih.gov/pubmed/17959832 http://www.ncbi.nlm.nih.gov/pubmed/9024685 GOC:jl ]
Synonyms: nuclear channels