TABLE 1.

Plating efficiency of PrV gK mutants^a

Virus	Cell type used for propagation of virus	Titer determined on:
		Complementing cells	Noncomplementing cells
PrV-Ka	Noncomplementing	8.8 × 106	2.7 × 106
	Complementing	6.2 × 106	3.6 × 106
PrV-gKβ	Noncomplementing	8.2 × 104	1.2 × 105
	Complementing	2.0 × 106	2.0 × 106
PrV-gKgB	Noncomplementing	8.9 × 103	6.1 × 103
	Complementing	3.0 × 105	2.6 × 105

^aViruses were grown on either gK-complementing or noncomplementing cells, and resulting virus stocks were titrated on complementing and noncomplementing cells. Both gK mutants produced only single infected cells or small foci of infectivity on noncomplementing cells, which were counted as infectious events.