, PMID Krawinkel et al., EMBO J. , PMID Takahashi et al., Cell , PMID Restricted distribution BCCM MTA Distributed asHP active culture or plasmid DNA Host for distributionEscherichia coli KxB HB Host referenceBoyer and RoullandDussoix, J. Mol. Biol. , PMID Related host referenceSambrook et al.