2JES:
reference: Identification of a gene in Bacillus subtilis bacteriophage SPP1 determining the amount of packaged DNA., Tavares P, Santos MA, Lurz R, Morelli G, de Lencastre H, Trautner TA, J Mol Biol. 1992 May 5;225(1):81-92. PMID: 1583695

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