SNAP-8 mass & m/z.

Molecular formula C41H70N16O16S · Signaling & Neuroactive. Mass and m/z below are computed from the verified molecular formula; the isoelectric point is computed only where the sequence permits.

Compound page →Open dataset →Sequence calculator →

Molecular mass

Computed from the verified molecular formula.
Average molecular weight	1075.17 g/mol
Monoisotopic mass	1074.4876 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)

Predicted protonated ion series [M+nH]ⁿ⁺, m/z = (M + n·1.007276) / n.
Charge state	m/z (monoisotopic)	m/z (average)
[M+1H]1+	1075.4949	1076.18
[M+2H]2+	538.2511	538.59
[M+3H]3+	359.1698	359.40
[M+4H]4+	269.6292	269.80

Isoelectric point (pI)

Not computed

pI is not published for this compound — modified N-terminus (Ac). 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

More signaling & neuroactive analytics

Analytical reference