Chicken repeat 1 (CR1) elements, which define an ancient family of vertebrate non-LTR retrotransposons, contain two closely spaced open reading frames.


Chicken repeat 1 (CR1) elements comprise a family of non-long terminal repeat (LTR) retrotransposons that have several noteworthy features. For example, whereas most other non-LTR elements have poly(A) tracts or other simple A-rich repeats at their 3' ends, the 3' ends of CR1 elements conform to the consensus [(CATTCTRT)(GATTCTRT)1-3]. CR1 elements also… (More)