Table 2. PCR amplification of transgene DNA sequences in piglets.

Lentiviruses (5×105 ifu/ml, ml)	Number of sperm incubated with lentiviruses	Source of DNA template for PCR amplification
		Ear biopsy from 3 day old piglet		Ear biopsy from 30 day old piglet	Ear biopsy from 120 day old piglet
		No. of piglets	No. of PCR-positive piglets (%)	No. of PCR-positive piglets	No. of PCR-positive piglets
10	1×109	59	6 (10.17%)	6	6