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Creative Diagnostics understands that the interactions in question are complex and require detailed, trustworthy datasets for proper analysis. Our platform delivers comprehensive information about the binding properties of different immunoglobulin types and species to help researchers refine their antibody workflows and choose suitable purification methods while developing strong experimental protocols. The platform stands as the authoritative guide for deciphering immunoglobulin binding profiles due to its comprehensive database and technical knowledge base.
Figure 1. Immunoglobulin Proteins.
Standardized symbols simplify the interpretation of binding affinities.
Our platform revolves around an interactive table that visualizes how various antibody species/isotypes interact with Protein A, G, L and A/G. Researchers can swiftly find matching protein-antibody combinations through this tool while evaluating binding profiles between different species and applying filters for specific uses such as purification or flow cytometry.
| Antibody | Protein L | Protein A | Protein G | Protein A/G |
| Human IgG | s | s | s | s |
| Mouse IgG | s | s | s | s |
| Rabbit IgG | w | s | s | s |
| Goat IgG | nb | w | s | s |
| Rat IgG | s | w | m | m |
| Sheep IgG | nb | w | s | s |
| Bovine IgG | nb | w | s | s |
| Guinea Pig IgG | w | s | w | s |
| Hamster IgG | s | m | m | m |
| Pig IgG | s | s | w | s |
| Horse IgG | – | w | s | s |
| Donkey IgG | – | m | s | s |
| Dog IgG | – | s | w | s |
| Cat IgG | – | s | w | s |
| Monkey IgG (Rhesus) | – | s | s | s |
| Chicken IgG | nb | nb | nb | nb |
| Human IgM | s | w | nb | w |
| Human IgE | s | m | nb | m |
| Human IgD | s | nb | nb | nb |
| Human IgA | s | w | nb | w |
| Human IgG1 | s | s | s | s |
| Human IgG2 | s | s | s | s |
| Human IgG3 | s | w | s | s |
| Human IgG4 | s | s | s | s |
| Mouse IgG1 | s | w | m | m |
| Mouse IgG2a | s | s | s | s |
| Mouse IgG2b | s | s | s | s |
| Mouse IgG3 | s | s | s | s |
| Rat IgG1 | s | w | m | m |
| Rat IgG2a | s | nb | s | s |
| Rat IgG2b | s | nb | w | w |
| Rat IgG2c | s | s | s | s |
| Bovine IgG1 | nb | w | s | s |
| Bovine IgG2 | nb | s | s | s |
| Sheep IgG1 | nb | w | s | s |
| Sheep IgG2 | nb | s | s | s |
| Goat IgG1 | nb | w | s | s |
| Goat IgG2 | nb | s | s | s |
| Horse IgG(ab) | – | w | nb | w |
| Horse IgG(c) | – | w | nb | w |
| Horse IgG(T) | – | nb | s | s |
| Mouse IgM | s | nb | nb | nb |
| Human IgA1 | s | w | nb | w |
| Human IgA2 | s | w | nb | w |
Optimize resin selection by analyzing binding profiles to pick Protein A for strong-binding Human IgG1/2/4 and Protein G for Goat IgG when Protein A interactions are weak while using Protein L for kappa light chain binding of diverse isotypes such as IgM and IgA and resolve low yield by changing to alternative proteins like Protein G for Rat IgG2a that does not bind Protein A.
Select high-affinity antibody-protein pairs such as Mouse IgG1 with Protein A for ELISA/Western blotting to achieve high signal-to-noise and choose low-affinity pairs like Rabbit IgG with Protein L for flow cytometry/IHC to minimize background signals while selecting secondary antibodies such as Goat anti-Mouse IgG to avoid cross-species reactivity.
The process of filtering antibody libraries from phage display and hybridoma sources with Protein A/G/L data helps enrich clones that show desired Fc interactions while designing bispecific antibodies benefits from Human IgG3's FcRn binding properties for longer half-life.
At Creative Diagnostics, we leverage our binding capacity database to offer tailored solutions for your research needs:
Accelerate antibody discovery with our scalable screening platforms:
Library Screening
Screen large antibody libraries (e.g., phage display, hybridoma libraries) against Protein A/G/L or target antigens to identify high-affinity clones.
Parallel Kinetic Assays
Conduct simultaneous kinetic analyses of multiple antibody variants using automated SPR/BLI systems, reducing turnaround time for candidate selection.
Custom Assay Design
Develop tailored, high-performance high-throughput workflows meticulously optimized to meet your specific throughput, sensitivity, and dynamic range requirements.
Researchers at Creative Diagnostics utilize our extensive database and technical proficiency to make well-informed choices regarding protein selection protocols and assay design. Our resources and custom services provide reliable, high-quality results for research involving common species like humans or challenging models like chickens. Reach out to us immediately to find out how our binding capacity information and services can meet your research or production requirements.
Figure 2. Case study of binding capacities of immunoglobulin proteins. The graph demonstrates binding kinetics of a test antibody to Protein G, showing normalized binding signals across different concentrations.
The IgG class contains both IgG1 and IgG2 subclasses which display unique binding characteristics that enable their use in diverse applications. IgG1 serves as a common choice for ELISA and Western blotting while IgG2 is mainly applied in flow cytometry and immunohistochemistry.
Detecting mouse antigens with human antibodies is discouraged since it produces cross-reactivity issues and false-positive outcomes. Antibodies made from mouse origins show superior performance when they target mouse antigens.
No single immunoglobulin protein functions across all detection systems. Detection system performance with immunoglobulin proteins depends on the particular-isotype and the detection system used. You must verify the compatibility between your antibody and detection system before use.
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