293 nuclear extract
Active Motif's 293 nuclear extract was prepared from cell cultures of the Human Embryonic Kidney (HEK) 293 cell line. This cell line was originally derived from transformation of normal human embryonic tissue cultures with a sheared DNA fragment of the left arm of the adenoviral 5 viral genome. These cells are commonly used in research due to their ease of growth and transfectability. However, since the cellular origin of these hypotriploid cells is poorly understood, they are not recommended for use as an in vitro model for kidney cell function. 293 nuclear extract contains all the basal transcriptional and mRNA splicing components and serves as an ideal cell-free platform for analysis of transcription and pre-mRNA processing mechanisms.