NUKLEOSOMEN (CYTOLOGIE); CHROMATINSTRUKTUR (CYTOLOGIE); GENREGULATION, REGULATION DER GENEXPRESSION (MOLEKULARBIOLOGIE); ELEKTRONENMIKROSKOPIE (BIOLOGISCHE TECHNIKEN); KRYOTECHNIKEN + EINFRIEREN + KRYOFIXATION (BIOLOGISCHE TECHNIKEN); NUCLEOSOMES (CYTOLOGY); CHROMATIN STRUCTURE (CYTOLOGY); GENE REGULATION, REGULATION OF GENE-EXPRESSION (MOLECULAR BIOLOGY); ELECTRON MICROSCOPY (BIOLOGICAL TECHNIQUES); CRYOTECHNIQUES + FREEZING TECHNIQUES + CRYOFIXATION (BIOLOGICAL TECHNIQUES)