Powered by BiozAbove Hinge Digestion of Human IgG1
GingisKHAN (Kgp) is a cysteine protease that digests human IgG1 at a single site above the hinge, generating intact and homogenous Fab and Fc fragments.
The enzyme is used to characterize antibody-based biotherapeutics using LC-MS, to study Fc glycan analysis, bispecific antibodies, affinity and avidity effects and to identify post-translational modifications.
- Reliable – digests human IgG1 above the hinge
- Fast – generates intact Fab and Fc fragments from human IgG1 within one hour
- Middle-level characterization of human IgG1
GingisKHAN® Lyophilized
Lyophilized enzyme for above hinge digestion of human IgG1GingisKHAN® Fab Kit
Lyophilized enzyme and affinity resin for above hinge digestion of human IgG1 and purification of Fab fragmentsAbout GingisKHAN®
GingisKHAN is a cysteine protease that digests human IgG1 at a single site above the hinge (KSCDK / THTCPPC), generating intact Fab and Fc fragments.
GingisKHAN is a lysine-specific protease. The single digestion site is a result of the three-dimensional structure of human IgG1, making this lysine exposed for the enzyme. Additional digestion sites at exposed lysines on the Fc may appear if the N-glycans are removed. GingisKHAN requires mildly reducing conditions to be active, and optimal activity is obtained at 37°C and pH 8. The reducing agent (2 mM cysteine) is provided together with the enzyme.
GingisKHAN is purified from Porphyromonas gingivalis.
GingisKHAN® Citations
GingisKHAN® Lyophilized
Lyophilized enzyme for above hinge digestion of human IgG1.
GingisKHAN Lyophilized is available as a lyophilized powder in 2000 unit vials for digestion of up to 2 mg human IgG1. The enzyme requires mildly reducing conditions to be for active, and is provided together with 5 vials of lyophilized GingisKHAN Reducing Agent.
- Flexible format for method development
- Possible to combine enzymes for improved efficiency
- Amenable to automated workflows
- Ready to use – just add water!
Available Products
For information on how to order, visit Place an Order or contact us directly at order@genovis.com.
Unit Definition
One unit cleaves ≥ 95% of 1μg human IgG1 when incubated in 0.1 M Tris, pH 8.0 at 37°C for 1 hour.
Content and Storage
GingisKHAN Lyophilized is reconstituted by addition of water. No preservatives added. It is supplied with 5 vials of lyophilized GingisKHAN Reducing Agent (10x), containing 20 mM cysteine upon reconstitution.
GingisKHAN Lyophilized and GingisKHAN Reducing Agent are shipped cold and should be stored at -20°C upon arrival.
After reconstitution, the GingisKHAN enzyme is stable for at least 1 month at +4-8°C. Reconstituted GingisKHAN Reducing Agent cannot be stored - use it freshly prepared!
Instructions
Product Specifications
Safety Data Sheet
Certificate of Analysis
GingisKHAN® Fab Kit
Lyophilized enzyme and affinity resin for above hinge digestion of human IgG1 and purification of Fab fragments.
GingisKHAN Fab Kit contains one vial of lyophilized GingisKHAN, five vials of GingisKHAN Reducing Agent for antibody digestion, and four microspin columns of CaptureSelect™* CH1 resin for affinity purification of the Fab fragments. The CaptureSelect™ IgG-CH1 affinity matrix recognizes the CH1 domain of human IgG antibodies, enabling purification of Fab fragments independent on the light-chain isotype. Due to its unique selectivity for the CH1 domain, no co-purification of free light-chain contaminants will occur. Each CaptureSelect™ microspin column contains sufficient material to purify 0.5 mg human IgG1.
- Purification of homogeneous Fab fragments from human IgG1
- Reliable workflow for preparative applications
- Enables chain pairing characterization of bispecific antibodies
Available Products
For information on how to order, visit Place an Order or contact us directly at order@genovis.com.
Unit Definition
One unit of GingisKHAN enzyme digests ≥ 95% of 1μg human IgG1 when incubated in 0.1 M Tris, pH 8.0 at 37°C for 1h.
Content and Storage
GingisKHAN Fab Kit is shipped cold. The GingisKHAN Lyophilized vials and GingisKHAN Reducing Agent should be stored at -20°C upon arrival.
The microspin columns containing CaptureSelect™* IgG-CH1 resin should be stored at +4-8°C. Do not freeze the spin columns!
After reconstitution, the GingisKHAN enzyme is stable for 2 months at +4-8°C. Reconstituted GingisKHAN Reducing Agent cannot be stored - use it freshly prepared!
Instructions
Product Specifications
Safety Data Sheet
Certificate of Analysis
* Thermo Scientific™ CaptureSelect™ resin from Thermo Fisher Scientific Inc. and its subsidiaries. Thermo Fisher and CaptureSelect are trademarks of Thermo Fisher Scientific Inc. and its subsidiaries.
FAQ and Support
Popular FAQ
We recommend using the 10x reducing agent provided with GingisKHAN which has an optimized pH to provide full enzymatic activity without affecting the disulphide bridges between the light chain and Fd region of the heavy chain, keeping the Fab intact. If other reducing agent is used there is a risk for non-optimal reaction conditions. It is important to use freshly prepared Reducing Agent (max storage 6h) for guaranteed activity of GinigsKHAN.
The enzyme is a cysteine protease that can be inhibited by alkylating agents such as iodoacetamide. There are also several other known inhibitors to this enzyme, like KYT-36.
Yes. GingisKHAN is provided lyophilized. After reconstitution, the enzyme can be used for up to 4 different antibodies. The digestion is performed in solution and you can prepare Fab fragments from 4 x 0.5 mg human IgG1. The purification step is done with Capture Select columns and 4 columns are provided in the kit.
Genovis provides a GingisKHAN Fab kit containing a specific Capture Select CH1 resin for further purification of the Fab. See this page for more information.
No. GingisKHAN is a protease that digests at exposed Lysines with no secondary structure restrictions. At the recommended reaction conditions, GingisKHAN digestion above the hinge has only been confirmed on human IgG1 with the exposed lysine above the hinge, (…KSCDK / THTCPPCP…). No digestion has been confirmed on other subclasses of human IgG except for several digestion sites in human IgG3.
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