Nucleic Acids Research, 1994, Vol. 22, No. 8 1476-1483
© 1994
GENOME STRUCTURE AND MAPPING |
Physical map and set of overlapping cosmid clones representing the genome of the archaeon Halobacterium sp. GRB
Department of Biology, University of Ottawa 30 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
*To whom correspondence should be addressed
Received December 2, 1993. Revised March 16, 1994. Accepted March 16, 1994.
We have constructed a complete, five-enzyme restriction map of the genome of the archaeon Halobacterium sp. GRB, based on a set of 84 overlapping cosmid clones. Fewer than 30 kbp, in three gaps, remain uncloned. The genome consists of five repllcons: a chromosome (2038 kbp) and four plasmids (305, 90, 37, and 1.8 kbp). The genome of Halobacterium sp. GRB is similar in style to other halobacterlal genomes by being partitioned among multiple replicons and by being mosaic in terms of nucleotlde composition. It is unlike other halobacterlal genomes, however, in lacking multicopy families of insertion sequences.
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