title: Matthias Jacob Schleiden and the definition of the cell nucleus.
authors.affiliation: Institute of Cell and Tumor Biology, German Cancer Research Center, Heidelberg, Federal Republic of Germany.
authors.forename: W W
authors.initials: WW
authors.lastname: Franke
mesh_terms: D003585:Cell Biology / Q000266:history*; D002467:Cell Nucleus / Q000166:cytology*; D005858:Germany; D049672:History, 19th Century