How is chromatin classified?

-Euchromatin (relaxed thin fiber- fiber A (d=35-60 A) /Less unstained filaments in interphase/filaments appear dark and dense at metaphase (condensation), genetically active, clear during interphase (decondensed) ) -Heterochromatin (Condensed fiber B (d=200-300 A), Densly stained filaments, Content of proteins is higher than euchromatin, correspond to 80% of DNA) Can be (constitutive of facultative)