KNOWLEDGE CENTRE
Peptide research knowledge centre
Reference material on peptide chemistry, analytical methods and documentation. These pages cover how peptides are characterised and how to read the evidence that comes with them. They contain no dosing information, no administration guidance and no therapeutic claims, because none of that is within the scope of this website.
How these articles fit together
These eight pages are ordered deliberately, because each one assumes the vocabulary established by the one before it. Read end to end they answer a single question: what would it take to know that the material in a vial is what the label says it is?
The fundamentals come first because almost every later disagreement traces back to vocabulary. A peptide’s mass is not the sum of its amino acid masses, a sequence is incomplete without its terminal modifications, and a quantity in milligrams may or may not refer to peptide rather than salt. Get those wrong and every downstream number is misread.
The analytical methods follow, and they divide the problem in two. Chromatography answers how many species are present; mass spectrometry answers what they are. Neither answers the other, which is why a purity percentage and an identity confirmation are different claims and why a certificate carrying only one of them is incomplete.
Documentation is where those methods become evidence. A measurement matters only if it is traceable to the batch in front of you, with the conditions it was run under stated — which is the difference between a certificate of analysis and a product description formatted to resemble one.
Handling then explains why documentation has a shelf life. Material degrades by a small number of predictable routes, and which routes apply depends on the sequence, so a result from six months ago may no longer describe what is in the vial today.
Finally, the India-specific context covers what changes in practice: ambient temperature and humidity during transit and storage, which authorities govern what, and where independent analytical capability can be accessed domestically.
Fundamentals
The vocabulary and chemistry that everything else on this site assumes.
What are peptides?
What peptides are, how they differ from proteins, how synthetic peptides are made, and the vocabulary used on catalogs and certificates of analysis.
Read the articleLyophilized peptides explained
What freeze-drying does to a peptide, why research peptides are supplied as dry solids, how to read a cake, and what residual moisture means.
Read the articleAnalytical methods
How peptides are separated, identified and quantified, and what each method can actually establish.
HPLC analysis of peptides
How reversed-phase HPLC separates peptides, which method parameters change the reported purity, and how to read a peptide chromatogram critically.
Read the articleMass spectrometry and peptide characterisation
How ESI and MALDI mass spectrometry confirm peptide identity, why average and monoisotopic masses differ, and which mass shifts are diagnostic.
Read the articlePeptide purity explained
What a peptide purity percentage actually measures, why it differs from net peptide content, and which method details make a purity claim readable.
Read the articleDocumentation and handling
Reading the paperwork that comes with a batch, and understanding how material changes over time.
Understanding peptide certificates of analysis
How to read a peptide certificate of analysis: which fields carry real information, how to spot a template, and what a COA cannot tell you.
Read the articlePeptide stability and degradation
The routes by which peptides degrade: hydrolysis, oxidation, deamidation and aggregation, and the storage factors that influence each of them.
Read the articleWorking in India
Practical context specific to sourcing and handling peptides here.
Scope of this section
These articles are about chemistry, measurement and documentation. They deliberately do not cover what any compound does in a living organism, how much of anything to use, or how to prepare material for any use other than laboratory analysis.
That is not caution for its own sake. Peptide Tactics supplies research materials, not medicines, and content that blurred the two would misrepresent what is being sold. Where we could not verify a fact against an authoritative source, the relevant page says so explicitly rather than filling the gap.
For compound-specific reference data, see the research peptide catalog. For our position on research use, see the research-use policy.