Angiotensin-converting enzyme 2 (ACE2), partial (Active), human, recombinant

Organism: Homo sapiens (Human). Source: Mammalian cell. Expression Region: 18-740aa. Protein Length: Partial. Tag Info: C-terminal hFc-tagged. Target Protein Sequence: QSTIEEQAKT FLDKFNHEAE DLFYQSSLAS WNYNTNITEE NVQNMNNAGD KWSAFLKEQS TLAQMYPLQE IQNLTVKLQL QALQQNGSSV LSEDKSKRLN TILNTMSTIY STGKVCNPDN PQECLLLEPG LNEIMANSLD YNERLWAWES WRSEVGKQLR PLYEEYVVLK NEMARANHYE DYGDYWRGDY EVNGVDGYDY SRGQLIEDVE HTFEEIKPLY EHLHAYVRAK LMNAYPSYIS PIGCLPAHLL GDMWGRFWTN LYSLTVPFGQ KPNIDVTDAM VDQAWDAQRI FKEAEKFFVS VGLPNMTQGF WENSMLTDPG NVQKAVCHPT AWDLGKGDFR ILMCTKVTMD DFLTAHHEMG HIQYDMAYAA QPFLLRNGAN EGFHEAVGEI MSLSAATPKH LKSIGLLSPD FQEDNETEIN FLLKQALTIV GTLPFTYMLE KWRWMVFKGE IPKDQWMKKW WEMKREIVGV VEPVPHDETY CDPASLFHVS NDYSFIRYYT RTLYQFQFQE ALCQAAKHEG PLHKCDISNS TEAGQKLFNM LRLGKSEPWT LALENVVGAK NMNVRPLLNY FEPLFTWLKD QNKNSFVGWS TDWSPYADQS IKVRISLKSA LGDKAYEWND NEMYLFRSSV AYAMRQYFLK VKNQMILFGE EDVRVANLKP RISFNFFVTA PKNVSDIIPR TEVEKAIRMS RSRINDAFRL NDNSLEFLGI QPTLGPPNQP PVS. Purity: Greater than 90% as determined by SDS-PAGE. Endotoxin: Less than 1.0 EU/ug as determined by LAL method. Biological Activity: ?Measured by ACE2 protein (CSB-MP866317HU) binding ability in a functional ELISA. Coat the plate with 0.2µg/well (2µg/ml, 100µl/well) of SARS-CoV-2 S1 protein (CSB-MP3324GMY), add 100µl/well (0.7629-100000ng/ml, gradient dilution, 2x to 18x) of ACE2 protein and 100µl/well of Peroxidase-Affinipure Goat Anti-Human IgG, Fcgamma Fragment Specific (CSB-PA160506). Wells were washed with buffer, and then A450 nm was measured. The results showed SARS-CoV-2 S1 protein could bind ACE2 protein. The EC50 is 56.64 - 103.6 ng/ml. ?Measured by ACE2 protein (CSB-MP866317HU) binding ability in a functional ELISA. Coat the plate with 0.5µg/well (5µg/ml, 100µl/well) of SARS-CoV-2 S1-RBD protein (CSB-YP3324GMY1), add 100µl/well (0.762939-100000ng/ml, gradient dilution, 2x to 18x) of ACE2 protein and 100µl/well of Peroxidase-Affinipure Goat Anti-Human IgG, Fcgamma Fragment Specific (CSB-PA160506). Wells were washed with buffer, and then A450 nm was measured. The results showed SARS-CoV-2 S1-RBD protein could bind ACE2 protein. The EC50 is 31.80 - 44.69 ng/ml. ?Measured by ACE2 protein (CSB-MP866317HU) binding ability in a functional ELISA. Coat the plate with 0.5µg/well (5µg/ml, 100µl/well) of SARS-CoV-2 S1-RBD protein (CSB-MP3324GMY1b1), add 100µl/well (0.762939-100000ng/ml, gradient dilution, 2x to 18x) of ACE2 protein and 100µl/well of Peroxidase-Affinipure Goat Anti-Human IgG, Fcgamma Fragment Specific (CSB-PA160506). Wells were washed with buffer, and then A450 nm was measured. The results showed SARS-CoV-2 S1-RBD protein could bind ACE2 protein. The EC50 is 2.785-9.139 ng/ml. ?Measured by ACE2 protein (CSB-MP866317HU) binding ability in a functional ELISA. Coat the plate with 0.2µg/well (2µg/ml, 100µl/well) of ACE2 protein, add 100µl/well (0.00001164153-200000ng/ml, gradient dilution, 4x to 18x) of SARS-CoV-2 S1-RBD protein (CSB-MP3324GMY1) and 100µl/well of Peroxidase-Affinipure Goat Anti-Human IgG, Fcgamma Fragment Specific (CSB-PA160506). Wells were washed with buffer, and then A450 nm was measured. The results showed SARS-CoV-2 S1-RBD protein could bind ACE2 protein. The EC50 is 8.363-12.82 ng/ml ng/ml. ?The SPR sensorgram shows the binding between ACE2 protein (CSB-MP866317HU) and SARS-CoV-2 S1-RBD protein (CSB-YP3324GMY1). ACE2 protein was injected at 5 concentrations (400, 200, 100, 50, 0 nM) across 0.5 mg/ml of SARS-CoV-2 S1-RBD protein captured on a COOH chip. The results showed ACE2 protein could bind SARS-CoV-2 S1-RBD protein with an affinity constant of 100 nM. ?The SPR sensorgram shows the binding between ACE2 protein (CSB-MP866317HU) and SARS-CoV-2 S1-RBD protein (CSB-MP3324GMY1b1). ACE2 protein was injected at 5 concentrations (100, 50, 25, 12.5, 0 nM) across 0.5 mg/ml of SARS-CoV-2 S1-RBD protein captured on a COOH chip. The results showed ACE2 protein could bind SARS-CoV-2 S1-RBD protein with an affinity constant of 13.8 nM. Form: Lyophilized powder. Buffer: Lyophilized from a 0.2 µm filtered PBS, 6% Trehalose, pH 7.4. Reconstitution: We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20 °C/-80 °C. Our default final concentration of glycerol is 50%. Customers could use it as reference. Storage: The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself. Generally, the shelf life of liquid form is 6 months at -20 °C/-80 °C. The shelf life of lyophilized form is 12 months at -20 °C/-80 °C. Notes: Repeated freezing and thawing is not recommended. Store working aliquots at 4 °C for up to one week. Relevance: n/a. Reference: n/a. Function: nan