Review
doi: 10.1016/0022-2836(91)80057-2.
Composite of A and F-type 5' terminal sequences defines a subfamily of mouse LINE-1 elements
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- PMID: 1920423
- DOI: 10.1016/0022-2836(91)80057-2
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Review
Composite of A and F-type 5' terminal sequences defines a subfamily of mouse LINE-1 elements
J Mol Biol.
.
Abstract
The 5' terminus of full-length L1 elements contains transcriptional control sequences. In mouse L1 (L1Md) elements, these sequences exist as an array of tandem direct repeats. Two types of repeat units, termed A-monomers and F-monomers, have been reported. Both monomers are about 200 bp in length but share no significant sequence homology. Previous studies have identified L1Md elements containing either A or F-monomers but not both. Here we describe three "composite" L1Md elements that contain both types of monomer sequence. Two of these composite L1Md elements are highly homologous and share the same structural rearrangements, implying that they arose from a common ancestor that has the same composite 5' end.
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