Abstract
Summary The micronuclear genome of Euplotes crassus contains a large number of Tec 1 transposons that are eliminated during the formation of the macronucleus after mating. Other ciliated protozoa possess repetitive DNA elements that undergo developmental elimination, but these elements differ from known Tecl elements in that they are associated with telomeric repeat sequences. We have carried out hybridization screenings of an E. crassus micronuclear recombinant library to determine if some Tec 1 elements in E. crassus might also be associated with telomeric repeat sequences. This analysis indicated that the vast majority of micronuclear Tec 1 elements are not associated with telomeric repeat sequences. In the few cases where micronuclear clones were identified that contained both a Tecl element(s) and telomeric repeat sequences, further analyses demonstrated that they were not directly associated.
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