Follistatin-344
FS-344 · recombinant follistatin · recombinant protein (344 aa). The index holds 5 assay reports on this compound across 1 batches from 1 suppliers.
Analytical fingerprint
Hand-authored chemistry. These properties describe the substance and do not change when a record is added.
Follistatin-344 is a 38 kDa glycoprotein and RP-HPLC purity is not a defined quantity for it. The index records follistatin submissions with purity marked NOT APPLICABLE and reports only what can honestly be measured: SDS-PAGE band pattern, SEC monomer fraction, total protein by BCA, endotoxin, and host-cell-protein and residual-DNA figures where a supplier provides them. None do. Every follistatin record here therefore reads as a documentation gap rather than a quality assessment, and that is the finding.
- Compound class
- Growth-hormone axis peptides
- Molecular formula
- recombinant protein (344 aa)
- Monoisotopic mass
- not defined
- Average mass
- 38000.00Da
- Residues
- 344
- Nominal retention (RG-2, 30 min)
- not defined
- Retention window
- —
- Counter-ion as usually shipped
- none expected
- Typical label claims
- 0.1 mg · 1 mg
- Analytical difficulty (index scale)
- 1.90 — hard
- Purity is a defined quantity
- NO
What the index has observed
Arithmetic over the 5 records the index holds. Aggregates on this page are computed over the records the index holds, which are not a random sample of the material on the market. Lots that get tested are lots someone chose to test. Read every figure here as a description of this dataset rather than as an estimate of a population.
The index holds 5 records for Follistatin-344, and purity is not a defined quantity for it. That is a gap in the index, not a finding about the compound.
Characteristic impurities and degradants
The left three columns are authored chemistry — what this molecule characteristically carries and where it elutes. The right three are what the index has actually reported.
| Named species | ΔRT (min, RG-2) | Δ mass (Da) | Seen in | Median % area | Max % area |
|---|
Degradation pathways
- aggregation
- proteolytic clipping during expression and purification
- glycosylation heterogeneity where expressed in a eukaryotic system
Full impurity profile, with what each named species implies about the synthesis →
Quarterly coverage
Most recent records
| Report | Supplier | Lot | Lab | Quarter | Purity % | Water % | Recovery % | Provenance | Flags | Result |
|---|---|---|---|---|---|---|---|---|---|---|
| AX-2025-019993 | ERP | ERP-2411-Y6431 | Nordanalyt | 2025-Q1 | N/A | 3.72 | — | Supplier-supplied | 1 | N/A |
| AX-2025-019995 | ERP | ERP-2411-Y6431 | Medutest | 2025-Q1 | N/A | 2.81 | — | Supplier-supplied | 1 | N/A |
| AX-2025-019997 | ERP | ERP-2411-Y6431 | VendorInvestigate | 2025-Q1 | N/A | 2.68 | — | Buyer-sourced | 1 | N/A |
| AX-2025-019996 | ERP | ERP-2411-Y6431 | Medutest | 2025-Q1 | N/A | 2.97 | — | Supplier-supplied | 1 | N/A |
| AX-2025-019994 | ERP | ERP-2411-Y6431 | Medutest | 2025-Q1 | N/A | 2.74 | — | Buyer-sourced | 1 | N/A |