Proteinase K, a broad-spectrum serine protease, firstly was extracted and purified from Engyodontium album. Because it can degrade Keratin, so named proteinase K. The crystallization and molecular structure of Proteinase K indicate it belongs to subtilisin family, whose active site has a characteristic catalytic triple amino acid Asp39-His69-Ser224. Proteinase K has no significant substrate specificity, and main cleavage site is the peptide bond at the carboxyl end of the hydrophobic amino acid such as aliphatic or aromatic.
Proteinase K is derived from yeast based on the optimized gene of Engyodontium album by site-directed mutation. It is purified by chromatography process, and with calcium and glycerin as protective agents.
E.C. No. 18.104.22.168
Storage: The proteinase K has been sterilized and filtered through a 0.22 μm filter, which can maintain its activity for a long time at room temperature and low temperature. It is recommended to store at 2-8 ℃ for long-term storage.
Expiry date: 24 months.
Please avoid repeated freeze-thaw cycles.
FOR RESEARCH, LABORATORY AND MANUFACTURE USE ONLY. NOT INTENDED FOR DIRECT USE ON HUMANS.