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  • Title: Cell wall synthesis and initiation of deoxyribonucleic acid replication in Bacillus subtilis.
    Author: Sandler N, Keynan A.
    Journal: J Bacteriol; 1981 Nov; 148(2):443-9. PubMed ID: 6795178.
    Abstract:
    We have observed a connection between cell wall synthesis and the initiation of chromosome replication in Bacillus subtilis. Initiation of chromosome replication was prevented in synchronous cultures in the presence of the cell wall synthesis inhibitor vancomycin. When vancomycin was added to the cultures after initiation of chromosome replication, one round of replication was completed but no reinitiation occurred. Similar results were obtained when cell wall synthesis was inhibited by ristocetin, cycloserine, cloxacillin, or cephaloridine. When sucrose was added to the medium, initiation of deoxyribonucleic acid replication occurred in the presence of vancomycin, to an extent which allowed replication of no more than approximately one-half of the deoxyribonucleic acid of the culture. The same was found in cultures of spheroplasts of B. subtilis. However, initiation of chromosome replication in spheroplasts was completely insensitive to cloxacillin.
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