Table 6.

Detection limits for contaminating cell lines based on the detection of nonexclusive markers

Cell line	ID	Nonexclusive marker	Detection limit for contaminating cells in 6000 background cells/PCR
			Cell no.	(%)
CEM	1	Human	<1	<0.02
NIH3T3	2	Mouse	<1	<0.02
a-tag R4	3	Rat	<1	<0.02
CHO	4	Chinese hamster	<1	<0.02
MDCKII	5	Dog	<1	<0.02
SW480	6	Human Y chromosome	<100	<2.0
HeLa	7	HPV18	<3	<0.05
Namalwa	8	EBV	<100	<2.0
Alexander	9	HBV	<1	<0.02
HEK293T	10	SV40 Tag	<10	<0.2
HEK293T	10	SV40 VP1	<10	<0.2
HEK293T	10	Adenovirus 5	<3	<0.05