Junk DNA, also known as noncoding DNA, is a term used to describe the portions of the genome that do not code for proteins. While once thought to be useless, recent studies have revealed that a significant portion of these sequences have functional roles. Due to this discovery, the term "junk DNA" has become frowned upon in the scientific community, and researchers have begun using more accurate synonyms such as noncoding DNA, noncoding regions, or noncoding sequences. Other terms include regulatory DNA, which refers to the noncoding regions involved in gene regulation and genome organization, and intergenic DNA, which refers to the portion of DNA between genes.