TABLE 1.

Transduction of the Cm^r marker inserted into the rth gene

Bacterium/plasmid	Frequency of transductiona
MG1655/pJK286	3.4 × 10−7
MG1655/pJK286-rth+ cdsA+	1.0 × 10−4
MG1655/pJK2039	9.1 × 10−7
MG1655/pJK2039-rth+ cdsA+	1.2 × 10−4
MG1655/pJK2039-rth+ cdsA−	7.6 × 10−7

^aNumber of Cm^r transductants divided by number of plaque-forming P1 particles.