Chain & AssayPlain, referenced explainers on research peptides: compound identity, published laboratory and animal-model research, quality control and lab handling.https://chainandassay.com/enHow to vet a research-peptide supplier: what independent testing can and cannot showhttps://chainandassay.com/articles/how-to-vet-a-research-peptide-supplier/https://chainandassay.com/articles/how-to-vet-a-research-peptide-supplier/A checklist for laboratories evaluating a research-peptide supplier, what a third-party test report proves and leaves open, and the red flags that published product analyses point to.Sat, 31 Oct 2026 00:00:00 GMTQuality & QCBPC-157: what the published research describeshttps://chainandassay.com/articles/bpc-157-published-research/https://chainandassay.com/articles/bpc-157-published-research/BPC-157's identity (sequence, formula, CAS), the cell and animal models it has been studied in, who did the research, and how little human data exists.Fri, 30 Oct 2026 00:00:00 GMTCompound research explainersGHK-Cu: identity, copper chemistry and published researchhttps://chainandassay.com/articles/ghk-cu-identity-and-published-research/https://chainandassay.com/articles/ghk-cu-identity-and-published-research/What GHK-Cu is (sequence, formula, CAS numbers), how the tripeptide binds copper(II), and what cell-culture, gene-expression and rat studies describe.Fri, 30 Oct 2026 00:00:00 GMTCompound research explainersHPLC vs mass spectrometry: what peptide purity and identity tests showhttps://chainandassay.com/articles/hplc-vs-mass-spectrometry-peptide-purity-identity/https://chainandassay.com/articles/hplc-vs-mass-spectrometry-peptide-purity-identity/How reversed-phase HPLC and mass spectrometry test a synthetic peptide, what purity by peak area means, and how to read a chromatogram and a mass spectrum.Fri, 30 Oct 2026 00:00:00 GMTQuality & QCHow lyophilised peptides are stored: what stability studies showhttps://chainandassay.com/articles/lyophilised-peptide-storage-stability/https://chainandassay.com/articles/lyophilised-peptide-storage-stability/What the literature says about storing freeze-dried peptides - degradation in the dry state and how temperature, moisture, light and oxygen affect it.Fri, 30 Oct 2026 00:00:00 GMTLab handlingSS-31 and MOTS-c: a roundup of mitochondria-focused peptide researchhttps://chainandassay.com/articles/ss-31-and-mots-c-mitochondria-research-roundup/https://chainandassay.com/articles/ss-31-and-mots-c-mitochondria-research-roundup/What published research reports on SS-31 (elamipretide) and MOTS-c, grouped by model type, with the elamipretide trial landscape and the open questions.Fri, 30 Oct 2026 00:00:00 GMTLiterature roundupsHow to read a peptide Certificate of Analysis (COA)https://chainandassay.com/articles/how-to-read-a-peptide-certificate-of-analysis/https://chainandassay.com/articles/how-to-read-a-peptide-certificate-of-analysis/What each section of a research-peptide Certificate of Analysis means, from mass-spectrometry identity and HPLC purity to peptide content, counter-ions, water and endotoxin.Sun, 25 Oct 2026 00:00:00 GMTQuality & QC