TABLE 1.

EOPs of wild-type, nullD, and chiD^r strains of φX174 and α3 in cells expressing foreign and chimeric external scaffolding proteins^a

Virus	EOP for BAF30 (recA) with:
	pφXDJ	pα3DJ	pφXJ	pα3J	pφX/α3D	pα3/φXD
φX174 nullDb	1.0	<10−6	10−6	10−6	10−6	10−6
α32 nullDc	<10−6	1.0	10−6	10−6	10−6	10−6
Wild-type φX174	1.0	1.0–10−6	1.0	1.0	10−3–10−5	1.0–10−2
Wild-type α3	1.0–10−6	1.0	1.0	1.0	1.0–10−2	10−3–10−5
φX174 chiDr	0.5	1.0–10−2	0.5	0.5	1.0	1.0–10−2

^aThe construction of chimeric genes is depicted in Fig. 2. 

^bContains two amber mutations in the gene. 

^cContains a frameshift mutation in codon 20.