The enigmatic nucleus of the marine dinoflagellate .

The marine, bloom-forming dinoflagellate CCMP 1329 (formerly ) has a genome atypical of eukaryotes, with a large size of ~4.15 Gbp, organized in plentiful, highly condensed chromosomes and packed in a dinoflagellate-specific nucleus (dinokaryon). Here, we apply microscopic and proteogenomic approaches to obtain new insights into this enigmatic nucleus of axenic .