There are 12 CoV spike protein produced in house with high quality which are covering various species. Among these CoV spike proteins, there are 1 HCoV CoV spike protein, 8 MERS-CoV CoV spike protein, 3 SARS CoV spike protein. All these CoV spike protein are expressed by different host cells. 2 CoV spike proteins are expressed by HEK293 Cells , 10 CoV spike proteins are expressed by Baculovirus-Insect Cells . These CoV spike proteins are produced with different tags, such as His Tag, Fc Tag.