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The peptide identity index tells you whether two names used for research peptides refer to the same molecule. Look up a catalog name, a CAS number, or an alias. Compare a second name when a vial, a paper, or a COA uses a different label.
Mass values computed from sequence are for checking an HPLC-MS report. This page does not calculate reconstitution volumes or human doses. Pair it with a lot-linked Certificate of Analysis and the 12-point COA audit.
MGF
80214-83-1
PEG-MGF
108174-48-7
Same IGF-1 Ec stretch. PEGylation makes the mass variable.
Peptide
MGF
Expected ions
[M+H]+
2,848.4449
[M+2H]2+
1,424.7261
[M+3H]3+
950.1531
Often confused with
Peptide
PEG-MGF
Sequence notation is too modified to compute ions here. Use the catalog mass and the COA report together.
Often confused with
Catalog CAS, formula, and sequence come from Tetrava lot identity tables. Monoisotopic mass and expected ions are calculated only when the sequence parses as standard residues plus common caps (acetyl, amide, Aib, Nle, pGlu). Heavily modified GLP-1 analogs stay as catalog text.
TB-500 is the main trap. Supplier tables often reuse the CAS and 4,963 Da mass of full-length thymosin beta-4 on a vial whose sequence is Ac-LKKTETQ. This index splits those identities on purpose.
Research use only. Not for human or veterinary consumption.
