Abstract:
:In Xenopus laevis eight tRNA genes are located in a 3.18 kb tandemly repeated unit. There are 150 copies of the unit at a single locus near the long arm telomere of one of the acrocentric chromosomes in the 14-17 group. Two additional classes of tRNA gene-containing repeats have been isolated (defined by clones p3.1 and p3.2) that have structures related to that of the 3.18 kb unit. Using in situ hybridization at the electron microscopic level, the p3.2 repeats are found clustered at a single locus in the subtelomeric region on one of the submetacentric chromosomes, whereas the p3.1 repeats are clustered at a locus indistinguishable from that containing the 3.18 kb repeats. This suggests that these tDNA tandem repeats can diverge in sequence from each other without being at distantly separated loci.
journal_name
Chromosomajournal_title
Chromosomaauthors
Narayanswami S,Doering JL,Fokta FJ,Rosenthal DS,Nguyen TN,Hamkalo BAdoi
10.1007/BF00352227subject
Has Abstractpub_date
1995-10-01 00:00:00pages
68-74issue
1eissn
0009-5915issn
1432-0886journal_volume
104pub_type
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