the atomic radii of chemical elements are a complicated task as the size of an atom is of the order of 1.2×10^-10m.

#Id: 489

#Unit 2. Cellular Organization

In interphase nuclei, this underlying proteinaceous structure changes its organization to occupy the entire nucleus; during interphase the structure is referred to as the matrix rather than the scaffold.

#Id: 490

#Unit 2. Cellular Organization

S/MARs is a DNA sequence which binds to base structure called scaffold.

#Id: 491

#Unit 2. Cellular Organization

#Id: 492

#Unit 2. Cellular Organization

The metaphase scaffold consists of a dense network of fibers. Threads of DNA emanate from the scaffold, apparently as loops of average length 30 to 90 kb.

#Id: 493

#Unit 2. Cellular Organization

S/MARs are constitutive (continuously bound to the matrix or scaffold), or facultative and change their interactions with the matrix depending on cell type or other conditions.

#Id: 494

#Unit 2. Cellular Organization

SATB1, is a protein that appears to regulate the association of MARs with the matrix in order to regulate transcription of genes in the vicinity of the MAR.