Regions of highly repetitive DNA from a eucaryotic chromosome, usually identifiable by its unusual nucleotide composition. Satellite DNA is not transcribed and has no known function.
A large tandemly-repeated DNA array that spans hundreds of kilobases to megabases.
DNA that forms a separate band in a bouyant density gradient because of its different nucleotide composition (A:T rich DNAs are less dense than G:C rich DNAs). Highly repetitive eukaryotic DNA primarily located around centromeres. Satellite DNA usually has a different buoyant density than the rest of the cell's DNA.
Repetitive DNA that forms a satellite band in a density gradient.
A genomic DNA fraction which has a different density to the main body of genomic DNA and therefore forms a separate band (satellite) during density gradient ultracentrifugation. The difference in density is due to a bias in base content caused by the presence of repeat sequence DNA.
This term was used originally to describe a discrete fraction of DNA visible in a CsCl2 density gradient as a "satellite" to the main DNA band. The term now refers to all simple sequence DNA having a centromeric location, whether distinguishable on density gradients or not (see Chapter 5).
Highly repetitive, non-transcribed DNA regions in eukaryotic chromosomes that have a different sedimentatin coefficient than other nuclear DNA.
Any type of highly repetitive DNA; formerly defined as DNA forming a satellite band after cesium chloride density gradient centrifugation.
Satellite DNA consists of highly repetitive DNA, and is so called because repetitive DNA sequences tend to have a relatively high frequency of the nucleotides adenine and thymine, and thus have lower density - such that they form a second 'satellite' band when genomic DNA is separated along a density gradient.