1887

Abstract

SUMMARY

In this study, we have established the colinearity of human cytomegalovirus (HCMV) genomes using stringent conditions of DNA-DNA filter hybridization of HCMV dIII fragments and cosmid-cloned AD169 strain HCMV DNA fragments. Large cosmid-cloned fragments of AD169 DNA were used for the preparation of radioactive probes by nick translation. These probes were hybridized to dIII digests of DNA from three fresh isolates of HCMV and to that of the Davis strain. Using published dIII restriction maps for the AD169 strain as a reference, the results obtained by hybridization allowed us to construct dIII restriction maps for the genomes of the three fresh isolates. Confirmation of our methodology was found in the correspondence between the dIII map we constructed for the Davis strain and that published previously. Furthermore, it is shown that variation in the restriction profiles of the unique regions of the genome are due to the absence or gain of restriction sites, and not to a rearrangement of fragments. This technique allows rapid construction of physical maps of the DNA of any fresh isolate for a given restriction enzyme provided the corresponding restriction map of a strain to be used as reference is available.

Keyword(s): genome , HCMV and restriction maps
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/content/journal/jgv/10.1099/0022-1317-66-10-2183
1985-10-01
2022-10-03
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