PMC:3265313 / 3885-4235 JSONTXT

{"project":"2_test","denotations":[{"id":"22312351-12690092-1233662","span":{"begin":347,"end":348},"obj":"12690092"}],"text":"2.1. Virus Strain and Cell Line\nThe SARS CoV strain used in this study is HKU39849. Foetal monkey kidney cells (FRhK-4) were cultured in minimal essential medium (MEM, Gibco, USA) with 10% foetal calf serum and penicillin streptomycin (Gibco, USA) at 37°C in 5% CO2 and were used for growing stock virus and for titration of viral infectivity [1, 2]."}