What does euchromatin refer to?

Euchromatin refers to regions of the genome that are less compacted and are generally associated with actively transcribed genes. This more open chromatin structure allows for easier access by the transcription machinery, facilitating the expression of genes. In euchromatin, the DNA is not tightly wrapped around histones, which is characteristic of heterochromatin, the more compacted form of DNA. The less compact nature of euchromatin also means that it appears lighter in color under a microscope compared to the denser heterochromatin.

Overall, euchromatin plays a crucial role in gene regulation and expression, making it essential for cellular function and development.