Orexin A

Orexin A

Orexin A is a synthetic peptide corresponding to a 33-amino acid sequence derived from the precursor protein prepro-orexin. It is classified within the hypocretin neuropeptide family and is studied for its interaction with orexin receptor systems.

Orexin peptide is utilized in biochemical and neurochemical research to examine receptor-ligand binding dynamics, peptide signaling behavior, and intracellular communication pathways. Orexin A is particularly relevant in studies involving G protein-coupled receptor (GPCR) systems and neuropeptide-mediated signaling networks.

Mechanism of Action

Orexin A is investigated for its interaction with two primary receptor subtypes:

• Orexin receptor 1 (OX1R)
  
• Orexin receptor 2 (OX2R)
  

These receptors belong to the G protein-coupled receptor (GPCR) family and are involved in intracellular signaling cascades.

At the molecular level, Orexin A binds to OX1R and OX2R, leading to receptor activation and subsequent initiation of downstream signaling pathways. These pathways include G protein-mediated processes such as phospholipase C (PLC) activation and intracellular calcium mobilization.

Furthermore, receptor activation is studied for its role in modulating neurotransmitter-related signaling, synaptic vesicle dynamics, and intracellular signal propagation. These interactions are analyzed in controlled experimental environments to understand peptide-mediated signaling mechanisms and receptor-specific activity.

Chemical Properties of Orexin A

Property	Value
Chemical Formula	C149H226N42O45S
Molar Mass	~3564.07 g/mol
CAS Number	205010-06-6
Synonyms	Hypocretin-1, OX-A, Orexin-A
Peptide Length	33 amino acids
Structural Features	Disulfide bond-stabilized peptide

Research Applications

Orexin Receptor Binding Studies

Orexin A is commonly used in laboratory research to investigate its binding affinity and interaction kinetics with OX1R and OX2R receptors. These studies help characterize ligand-induced conformational changes and receptor activation profiles.

GPCR Signaling Pathway Analysis

In addition, this peptide is applied in research exploring GPCR-mediated signaling cascades. Investigations often focus on second messenger systems, including PLC activation, calcium signaling, and downstream intracellular responses.

Neuropeptide Signaling Research

Beyond receptor binding, Orexin A is also utilized to study neuropeptide-related signaling pathways. This includes examining mechanisms associated with neurotransmitter release, synaptic interaction, and intracellular communication.

Structure–Activity Relationship (SAR) Studies

Moreover, Orexin A serves as a model compound in structure–activity relationship (SAR) research. These studies evaluate how variations in peptide structure, including sequence and disulfide bonding, influence receptor interaction, stability, and signaling behavior.

Why Choose BehemothLabz to Buy Orexin A for Research

Behemoth Labz provides research-grade orexin a for sale. Orexin A manufactured under controlled laboratory conditions with strict quality assurance protocols. Each batch undergoes analytical verification to ensure consistency in molecular composition and purity. So your next  orexin peptide buy should be from a premium website like BehemothLabz.

Comprehensive documentation, including laboratory testing reports and sourcing transparency, supports reproducibility in experimental settings. BehemothLabz maintains a compliance-focused approach, supplying compounds intended strictly for laboratory-based investigation and analytical research

Disclaimer

Orexin A is intended strictly for laboratory research and analytical purposes only. It is not intended for use in diagnostic procedures, therapeutic applications, or in vivo studies of any kind.

Any references to biochemical pathways, receptor interactions, or enzymatic processes are provided solely for informational and research-context purposes. This compound must be handled exclusively by qualified professionals in controlled laboratory environments in accordance with applicable regulations and safety guidelines.

Improper handling or use outside of controlled research settings is strictly prohibited.

References

• Neumann, J., Ahlrep, U., Hofmann, B., & Gergs, U. (2025). Contractile effects of retatrutide in isolated mouse atrial preparations. Naunyn-Schmiedeberg's archives of pharmacology, 398(12), 17147–17160. https://doi.org/10.1007/s00210-025-04335-0
• Kanu, C., Boye, K. S., Poon, J. L., Goetz, I., Williamson, S., Lou, J., Hartman, M. L., Martin, C. K., & Coskun, T. (2025). Appetite, eating attitudes, and eating behaviours during treatment with retatrutide in adults with type 2 diabetes: Results of a phase 2 study. Diabetes, obesity & metabolism, 27(12), 6988–6998. https://doi.org/10.1111/dom.70097 

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