Tools · TB-500 Fragment (Ac-LKKTETQ)
Computed analytical data · Research use only
TB-500 Fragment (Ac-LKKTETQ) mass & m/z.
Molecular formula C38H68N10O14 · Regenerative & Cytoprotective. Mass and m/z below are computed from the verified molecular formula; the isoelectric point is computed only where the sequence permits.
Molecular mass
| Average molecular weight | 889.02 g/mol |
|---|---|
| Monoisotopic mass | 888.4916 Da |
Average mass varies ~0.01–0.1 Da between atomic-weight tables; monoisotopic uses most-abundant-isotope masses.
ESI-MS m/z (positive mode)
| Charge state | m/z (monoisotopic) | m/z (average) |
|---|---|---|
| [M+1H]1+ | 889.4989 | 890.03 |
| [M+2H]2+ | 445.2531 | 445.52 |
| [M+3H]3+ | 297.1711 | 297.35 |
| [M+4H]4+ | 223.1302 | 223.26 |
Isoelectric point (pI)
Not computed
pI is not published for this compound — modified/capped peptide — pI not computed. A residue-pKa pI calculation is only valid for a linear, unmodified peptide of the standard 20 L-amino acids with free termini; computing one here would be a fabricated value.
Method & provenance
- Mass: element arithmetic over the verified molecular formula. Monoisotopic uses most-abundant-isotope masses (CODATA/AME); average uses IUPAC 2021 standard atomic weights.
- ESI-MS m/z: positive-mode protonated ions [M+nH]n+, m/z = (M + n·1.007276) / n, from the computed monoisotopic (and average) mass.
- pI: computed only for linear, unmodified peptides of the standard 20 L-amino acids with free termini; otherwise flagged. Values are analytical/characterization data only — no efficacy, dosing, or human-use meaning.
Related resources
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