How a laboratory sets up its first peptide project: sourcing, documentation, controls, sample handling and the records an Irish research facility is expected to keep.
Before the first order
Setting up a first peptide project is mostly a documentation exercise. Decide what question the compound is meant to answer, which model system will be used, what your controls are, and how results will be recorded — before any material is bought. A vial with no protocol attached to it becomes untraceable stock within weeks.
Then check the practical side of the facility: is there refrigerated and ideally −20 °C storage, a clean dedicated bench, appropriate PPE, and a sharps and chemical waste route? Peptides are not hazardous in the way solvents are, but they are moisture-sensitive and easily contaminated.
Choosing a supplier
- Purity stated as a method, not a slogan — ≥99% by HPLC means something; ‘pharmaceutical grade’ does not.
- A batch-specific certificate of analysis, not a generic specimen document reused across lots.
- Identity confirmation by mass spectrometry, so you know the vial contains the sequence you ordered.
- Independent third-party testing rather than in-house figures alone.
- Clear research-use-only terms, and no dosing guidance offered anywhere on the site.
Receiving and logging material
On arrival, check the seal, look at the cake, and match the batch code on the vial to the certificate. Log the compound, quantity, batch, supplier, arrival date and storage location in the same record every time — a simple spreadsheet is enough provided it is the only one.
Keep a study on a single batch wherever possible. Changing lot mid-experiment introduces a variable you cannot subtract afterwards, and it is the most common avoidable confound in small peptide studies.
Working reproducibly
- Reconstitute to a stated concentration and write that concentration on the vial with the date.
- Aliquot rather than repeatedly re-entering a single vial, to avoid freeze-thaw cycling and contamination.
- Record ambient conditions and timings; peptide stability in solution is time and temperature dependent.
- Retain the certificate of analysis alongside the experimental record, not in a separate email folder.
Supplied for laboratory research use only. Not for human or veterinary use.