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Schematic representation of the cell nucleus. The nucleoplasm (English nucleoplasm ) envelops the chromatin and the nucleolus.

As karyoplasm (from ancient Greek κάρυον karyon for "core" and πλάσμα plásma "structure"), also nuclear plasma or nucleoplasm or nucleoplasm , the content of the cell nucleus is referred to, which is enclosed by the nuclear envelope . It contains the chromatin , the thread-like form of decondensed chromosomes and the nucleoli .

The unstructured basic mass of the karyoplasm is called karyolymph (nuclear juice, interchromatin substance). This is pervaded by a protein framework, the core matrix , which brings it into shape.


  • Alberts: Molecular Biology of the Cell . 4th edition. Taylor & Francis, New York 2002, ISBN 978-0-8153-3218-3 .

Web links

Commons : Nucleoplasm  - collection of images, videos and audio files
Wiktionary: Karyoplasm  - explanations of meanings, word origins, synonyms, translations

Individual evidence

  1. ^ Keyword "Karyoplasma" in the Roche Lexicon of Medicine , 5th edition 2003. Online , accessed April 27, 2011.