In the specialized field of immunological research, the selection of high-quality reagents is paramount for obtaining reproducible data. My personal journey into understanding model antigens led me to explore the OTII peptide, a cornerstone for those studying antigen-specific T-cell responses. While navigating this technical landscape, I have found that distinguishing between various ovalbumin (OVA) derivatives is essential for experimental design.
Defining the OTII Peptide and Its Context
The OTII peptide OVA peptide is a class I (Kb)-restricted peptide epitope of ovalbumin, it is presented by the class I MHC (major histocompatibility complex) molecule, is frequently associated with the OVA (329-337) sequence, which serves as the core H2b-restricted class II MHC epitope. Researchers often refer to this as the Chicken Ovalbumin Peptide, which is highly valued for its role in the stimulation of antigen-specific T cells. When performing assays such as ELISPOT or intracellular cytokine staining (ICS), having a reliable peptide source ensures that the activation of OT-II cells remains consistent.
It is important to note that this is distinct from the OVA 257-264 peptides, which are class I (Kb)-restricted and are typically utilized for CD8+ T-cell studies. In contrast, the OTII peptide relates to CD4+ T-cell studies. I have observed that while peptides are essential for these models, they are often susceptible to degradation; specifically, the peptide is more susceptible to random protease OVA (329-337) - 1 mg s made by splenocytes, which is a critical factor when designing in vitro incubation times.
Technical Specifications and Variations
When sourcing these materials, one will encount OT II Peptide H-ISQAVHAAHAEINEAGR-OH. Product Code. PP51043. Chemical Formula. C74H120N26O25. Molecular Weight. 1,773.9 g/mol. Density. 1,526 g/cm3. Short Term er various lengths of the ovalbumin protein. For instance, the OVA peptide 323-339 (sequence ISQAVHAAHAEINEAGR) is a widely utilized Ovalbumin protein Ova (323-339) derivative. During my review of available materials, I noted the following technical details:
* Molecular Weight: Approximately 1,773.9 g/mol.
* Chemical Formula: C74H120N26O25.
* Specificity: Both DO11.10 and OT-II cells are both specific for a C-terminal epitope whose core encompasses amino acids 329-337.
In my experience, comparing the OVA (ovalbumin) peptide residues 257 to 280 against the shorter 329-337 sequence highlights the necessity of matching the epitope precisely to the transgenic model being used.
Integrating Research Tools
For those of us working with transgenic mouse models, the distinction between OTI and OTII is vital. As many enthusiasts know, OTI T-cells recognize the SIINFEKL peptide, which is a class I (Kb)-restricted peptide epitope of OVA. When I set up my protocols, I always ensure that the OTII reagents are kept under strict temperature controls to prevent premature degradation, as these peptides are sensitive to their environment.
Practical Considerations for Experimental Design
When working with these tools, the goal is often to u This peptide is derived from ovalbumin (OVA), a well-characterized protein, making it a valuable tool in immunological research, particularly for understanding nderstand how OT-II cells respond to specific stimulation. Whether you are investigating the OVA peptide for its role OVA 323-339 Peptide (ISQAVHAAHAEINEAGR) | CAS in T-cell trafficking or using it to activate CD4+ cells in the presence of specific cytokines, the quality of the synthesis is the most OVA (323-339) TFA salt | 92915-79-2 | PP51043 signi by BJ McFarland · 1999 · Cited by 100 — Proteins of the class II major histocompatibility complex (MHC) bind antigenic peptides that are subsequently presented to T cells. ficant variable.
I have found that the Chicken Ovalbumin Peptide serves as an indispensable tool for characterizing T-cell behavior. By keeping the OTII peptide in a stable, lyophilized state until the moment of use, one can effectively mitigate the risks associated with protease activity. Always verify the specific sequence requirements for your study, as the difference between a 323-339 sequence and a shorter 329-337 sequence can significantly impact the binding affinity to the I-Ab MHC complex.
By maintaining a rigorous approach to these reagents, researchers can ensure that their study of the immune response remains robust, objective, and highly reproducible.