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PubMed1973

Replication of bacteriophage SH-133 in the facultative autotroph Hydrogenomonas facilis. II. Bacteriophage synthesis and hydrogenase induction under step-up and step-down growth conditions.

Autotrophically grown infected cells are able to replicate phage SH-133 after being switched to a heterotrophic environment (step-up growth). The effect of step-down growth on phage replication varies with the choice of organic substrate. Phage replication and the induction of cellular hydrogenase occur under step-down growth from acetate but not peptone broth. The requirement of a continued source of energy for phage replication in either heterotrophically or autotrophically grown cells could be uniquely demonstrated in this phage-host system by the deletion of hydrogen from the growth medium.

Bacteriophages↗