TABLE 2.

Cell line CHOK1 is resistant to A-MuLV, and this block is glycosylation dependent^a

Cell line	Mean vector titer (BFU/ml)b ± SEM
	A-MuLV (PA317-BSN)	GALV (PG13-BSN)
CHOK1	0	90c
Lec2	(3.9 ± 0.5) × 104	(1.1 ± 0.1) × 106
Lec8	(3.7 ± 0.6) × 104	(1.0 ± 0.1) × 104

^aThese findings have been reported before (15, 16), and the results shown here are confirmatory. Lec2 and Lec8 are glycosylation-deficient derivatives of CHOK1. 

^bThe assays were done as described in Materials and Methods. 

^cMean of two values.