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. 2003 May 9;100(11):6759–6764. doi: 10.1073/pnas.1138025100

Table 2. PERV-A tropism and receptor utilization: receptor specificity.

Approximate LacZ pseudotype titre, units/ml
Target cell line PERV-A14/220 PERV-A PERV-B PERV-C
SIRC (rabbit) <4 <4 49 <4
SIRC HuPAR-1 4 × 103 6 59 <4
SIRC HuPAR-2 2 × 104 1 × 103 36 <4
SIRC BaPAR-2 6 × 103 NT NT NT
SIRC PoPAR 1 × 103 2 × 104 29 <4
SIRC AK008081 <4 <4 NT NT
NIH3T3 (mouse) <4 <4 NT NT
NIH3T3 HuPAR-1 8 × 103 16 NT NT
ST-IOWA (pig) 8 × 104 1 × 104 19 1 × 103
293 (human) 8 × 104 1 × 104 127 <4
HT1080 (human) 4 × 104 20 NT NT
HOS (human) 2 × 103 <4 NT NT

HuPAR-1, HuPAR-2, BaPAR-2, and PoPAR are functional PERV-A receptors when expressed in SIRC and, for HuPAR-1, in NIH3T3 cells. NT, not tested.