Table 3.

The effect of hsdC on the acquisition of new R-M systems

Donor	Recipient	Percent of transductants with donor phenotypes
		DnaC+ HsdSD	DnaC+ TetS
NM515 (rD+mD+)	NM824 (rK−mK+)	16	80
NM807 (rD−mD+)	NM824 (rK−mK+)	12	71
NM515 (rD+mD+)	NM822 (rK−mK+, HsdC−)	0*	71
NM807 (rD−mD+)	NM822 (rK−mK+, HsdC−)	12	72
NM807 (rD−mD+)	NM846 (rK+mK+, HsdC−)	1†	89

The order of the genes on the bacterial chromosome is hsdS hsdM hsdR dnaC Tn10. Cotransduction frequencies are based on at least 50 colonies. 

^*0 in 100 transductants. 

^†One r_D⁻m_D⁺ and two r_K⁻m_K⁺ transductants; the former requires entry of the hsdS_D gene and the potential for the production of EcoDI before recombination occurs.