Consistent with SARS CoV, various cleaved and uncleaved forms of the SARS-CoV-2 spike protein. Notably, the cleavage sample to the the SARS spike favourable Handle from Calu3 cells, a respiratory cell line, may differ somewhat and could signal dissimilarities among proteolytic cleavage on the spike proteins between The 2 viruses https://www.pinterest.com/pin/993958580252563462/