The viral main proteinase (M pro , also called 3CL pro ), which controls the activities of the coronavirus replication complex. It functions as a cysteine protease engaging in the proteolytic cleavage of the viral precursor polyprotein to a series of functional proteins required for coronavirus replication and is considered as an appealing target for designing anti-SARS agents.
Use a manual defrost freezer and avoid repeated freeze thaw cycles. Store at 2 to 8 ˚C for one week. Store at -20 to -80 ˚C for twelve months from the date of receipt.