X_element [SO_0001497]

X_element

ID: SO_0001497

The X element is a conserved region, of the telomere, of ~475 bp that contains an ARS sequence and in most cases an Abf1p binding site.

Possible functions include roles in chromosomal segregation, maintenance of chromosome stability, recombinational sequestering, or as a barrier to transcriptional silencing. This term was requested 2009-10-16 by Michel Dumontier, tracker id 2880747. From Janos Demeter: The only region shared by all chromosome ends, the X element core sequence is a small conserved element (~475 bp) that contains an ARS sequence and in most cases an Abf1p binding site. Between these is a GC-rich region nearly identical to the meiosis-specific regulatory sequence URS1.