
Buy Orexin A Research Peptide
Orexin A is available as a lyophilised powder, independently HPLC and MS-UPLC tested to ≥98% purity.

Buy Orexin A Research Peptide
Orexin A is available as a lyophilised powder, independently HPLC and MS-UPLC tested to ≥98% purity.
HPLC Verified
≥98% purity
Lyophilised
Powder format
Express Shipping
Cold-chain included
COA Available
Every batch
HPLC Verified
≥98% purity
Lyophilised
Powder format
Express Shipping
Cold-chain included
COA Available
Every batch
Same or Next Day Dispatch
Order before 12pm GMT for same-day dispatch; after 12pm ships next business day
Same or Next Day Dispatch
Order before 12pm GMT for same-day dispatch; after 12pm ships next business day
What is Orexin A?
A synthetic 33-amino-acid brain peptide also known as hypocretin-1, Orexin A is studied for its role in wakefulness and arousal. Research focuses on its activation of both orexin receptors and its central place in sleep-wake research.
- Studied for its activation of both orexin receptors (OX1R and OX2R).
- Investigated in sleep-wake and arousal research models.
- Examined for its role in feeding and arousal pathways.
- Used as a research tool to study orexin signalling.
For research use only. Not intended for human use.
Dual agonism at both OX1R and OX2R receptor subtypes distinguishes this 33-amino acid neuropeptide as a structurally complex and pharmacologically versatile research tool. Orexin A, also known as Hypocretin-1 (CAS 205640-90-0), carries the molecular formula C152H251N41O44S3 and a molecular weight of 3561.97 g/mol. The peptide features two intramolecular disulphide bonds and an N-terminal pyroglutamate residue. Produced via solid-phase peptide synthesis.
In vitro studies using hypothalamic neuron cultures have examined Orexin A-mediated activation of Gq-coupled calcium mobilisation and Gi-coupled cAMP inhibition, investigating how receptor subtype co-expression influences integrated intracellular signalling output. In vivo rodent models have explored the effects of central Hypocretin-1 administration on lateral hypothalamic neuronal firing patterns and downstream arousal circuit engagement.
Manufactured in a quality-controlled laboratory to a guaranteed purity of 98% or above. Every batch undergoes independent third-party testing using HPLC and MS-UPLC analysis before dispatch. Vials are vacuum sealed and stored in a temperature-controlled, monitored cold storage system. A batch-specific Certificate of Analysis is available on request.
Sold strictly for in vitro research purposes only. Not for human consumption. Intended for use by qualified researchers in laboratory settings only.
Scientific Review

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Quality Guaranteed
Every batch is HPLC-tested to ≥98% purity. Certificate of Analysis and SDS available on request.
