Oxidation, and the peroxide that came in with the surfactant
The sequence predicts the failure mode. A methionine predicts oxidation; an asparagine followed by a glycine predicts deamidation; a cysteine predicts disulphide scrambling.
Coverage naming GSP
Reporting from across the Journal that names GenScript Biotech Corporation, together with the correspondence this desk has had with the company about it. The dossier itself — the testing record, the correspondence log, the ordering box and the reader reports — is here. The company sells directly at genscriptpeptides.com, a labelled and nofollowed link the Journal is paid nothing for; read the record before you use it.
What twenty companies say about storage, and what they have measured
We asked twenty companies three questions about stability data and print every answer, refusal and non-response.
New Zealand health authority warns on falsified semaglutide pens
Reported from the analysis, not from a warning notice.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
SSA names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
WXT names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
ERP names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
The named comparison we promised two years ago
Duplicate submissions under different names test within-laboratory repeatability, which is a different quantity from between-laboratory reproducibility.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
Medutest result on a Qingdao dulaglutide lot lands 1.4 points above the supplier’s stated figure
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
The sample is not the batch
A result on one vial generalises to a batch only if the vial was drawn in a way that makes it representative — and nobody records how it was drawn.
A supplier suspends shipping to Mexico after 5 consecutive customs detentions
The route did not close because of a rule about peptides.