title: B1 SINEs in different rodent families.
abstract: B1 SINEs were studied in 22 families covering all major rodent lineages. The number of B1 copies considerably varies, from 1 x 10(4) in Geomyidae to 1 x 10(6) in Myodonta. B1 sequences can be divided into three main structural variants: B1 with a 20-bp tandem duplication (found in Gliridae, Sciuridae, and Aplodontidae), B1 with a 29-bp duplication (found in other families), and proto-B1 without duplication (pB1). These variants can be further subdivided according to their characters, including specific 7-, 9-, or 10-bp deletions. Different B1 subfamilies predominate in different rodent families. The analysis of B1 variants allowed us to propose possible pathways for the evolution of this SINE in the context of rodent evolution.
authors: Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 32 Vavilov Street, Moscow 119991, Russia.
authors: Natalia A
authors: NA
authors: Veniaminova
authors: Nikita S
authors: NS
authors: Vassetzky
authors: Dmitri A
authors: DA
authors: Kramerov
mesh_terms: D000818:Animals; D001483:Base Sequence; D019143:Evolution, Molecular; D008957:Models, Genetic; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D012377:Rodentia / Q000145:classification / Q000235:genetics*; D017384:Sequence Deletion; D012689:Sequence Homology, Nucleic Acid; D020086:Short Interspersed Nucleotide Elements; D013045:Species Specificity