DNA is packaged and is present as chromatin scaffolded with non-histone chromosomal proteins. In some places, chromatin is densely packed to form the darkly stained and transcriptionally inactive heterochromatin. Heterochromatin...
In many eukaryotic genes, the coding sequences are interrupted by blocks of non-coding sequences. These intervening sequences are termed introns. Exons can be defined as any region of the immature...
