293T (human embryonic kidney; ATCC CRL-3216), Vero E6 (African green monkey kidney; ATCC CRL-1586), LLC-MK2 (rhesus macaque kidney; ATCC CCL-7) and EpoNi/22.1 (Buettikofer’s epauletted fruit bat kidney, [44 (link)], kindly provided by M.A. Müller and C. Drosten) cell lines were obtained from collaborators. The cells were grown in Dulbecco’s modified Eagle’s medium (DMEM; PAN Biotech) supplemented with 10% fetal bovine serum (FBS; PAN Biotech) as well as 1x penicillin and streptomycin from a 100x stock solution (PAN Biotech). The cell lines were cultivated at 37 °C and 5% CO2 in humidified atmosphere. Transfection of 293T cells was achieved by calcium phosphate precipitation.
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