This substance names a technique in which its (*) fragments are cross-linked with proteins, sheared, and selectively immuno-precipitated.
This substance is the main target of a protein whose overexpression is triggered by a reduction in levels of let-7a micro-RNA. This substance is also the target of the SWR1 and INO80 enzyme families. Position-effect variegation occurs when cells lose expression of a gene through its abnormal juxtaposition with one form of this substance.  This substance names a technique in which its (*) fragments are cross-linked with proteins, sheared, and selectively immuno-precipitated. Lysine residues on this substance are frequent targets for methylation by HMT-enzymes, which facilitate the condensation of this substance. This substance composes the 30-nanometer fiber, and it typically assumes a "beads on a string" conformation. For 10 points, name this substance consisting of DNA wrapped around histone complexes, which condenses into chromosomes.
This substance is the main target of a protein whose overexpression is triggered by a reduction in levels of let-7a micro-RNA.
chromatin [prompt on "DNA", "histones", or "chromosomes" until read]