TABLE 2.

Transduction efficiency of phage K139 and the TCP island

Supernatanta	Transduction efficiency with the following recipients:
	RV79 (TCP+)		Vc857 (TCP−)b
	Apr	Kmr	Apr	Kmr
N16961ΩK139 (glo::bla), tcp::Kmc	5 × 10−1	<1 × 10−6d	5 × 10−4	<1 × 10−6d
O395ΩK139 (glo::bla), tcp::Kmc	6 × 10−1	<1 × 10−6d	5 × 10−4	<1 × 10−6d

^aThere was 10⁶ PFU of phage K139 per ml in each supernatant.

^bA number of TCP⁻ strains were tested as recipients.

^cConstructs with Km^r-oriR6K inserted in tcpI, aldA, tnp, and int were tested.

^dNo Km^r colonies were found in 10⁶ recipient cells.