A sequence model was tested experimentally; several designed peptides challenged a simple soluble/insoluble prediction.
What the study actually tested
Researchers screened more than 50,000 modified-amino-acid variants computationally, then synthesized selected PYY, 18A, and GLP-1-derived variants for solubility testing. In their PYY-related assay, variants 27 and 28 remained soluble across the tested PEG range, whereas variant 30 was insoluble even without PEG. Several GLP-1-derived variants were still insoluble at a final concentration of 0.33 mg/mL, prompting a different assessment method.
Numbers worth reading in context
| Study measure | Reported result |
|---|---|
| Computed variants | >50,000 |
| GLP-1 test level | 0.33 mg/mL |
| PYY variants | 27/28 soluble; 30 insoluble |
The >50,000 figure is a computational screen, not 50,000 synthesized and tested peptides. PEG precipitation and absolute solubility are different measurements; “completely soluble” means within that assay window. These distinctions matter when evaluating a modified sequence for a real experiment. Neither the model nor a single variant’s result supplies a validated concentration for a new customer peptide.
What to put in the RFQ or experiment plan
For a non-natural residue request, give the exact modified residue and position, proposed solvent system, target concentration, and intended analytical readout. Ask which predictions are only in silico and which properties were measured on material matching the requested structure. If solubility is a gate for the project, define a small-scale measured check before committing to a larger order.
Evidence boundary
The data are from selected published variants. They cannot be generalized to NHD products or used as a batch-specific solubility claim.
Sources and next step
Primary research: Sequence-based prediction of the intrinsic solubility of peptides containing non-natural amino acids. These external figures are not test results for an NHD lot.
Related NHD guide: read the related article. For a material-specific question, request a written quotation with the sequence, amount, intended use, and required records.
Sources & editorial method
AI-assisted writing and source verification. Numerical claims were checked against the linked full-text records, with source inconsistencies identified in the article. This is not independent scientific peer review or verification of a supplied lot.
1 linked records are listed in the references below. Read the editorial and AI-assistance policy.
How to interpret this article
The data are from selected published variants. They cannot be generalized to NHD products or used as a batch-specific solubility claim.
Research-use boundary: Catalog materials discussed on this website are for laboratory research, development and manufacturing use only, not for human or veterinary use. This content is not medical advice and does not provide administration instructions.
