D-Trp(23)-Teriparatide is a sequence-variant peptide impurity of teriparatide in which the terminal L-tryptophan residue is replaced by the D-enantiomer, creating a stereochemical analog rather than a truncation product. Such epimeric impurities may arise from racemization during solid-phase peptide synthesis, deprotection, or prolonged storage under stress conditions. Because the molecular formula and molecular weight are not specified, structural assignment relies on orthogonal characterization. Sensitive determination generally requires LC-MS/MS with chiral or high-resolution separation, supported by peptide mapping and, where needed, ion mobility or NMR to confirm configurational inversion.
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To provide the best experiences, we use technologies like cookies to store and/or access device information. Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. Not consenting or withdrawing consent, may adversely affect certain features and functions.
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The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
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![[N-Acetyl-Ser1]-Teriparatide](https://veeprho.com/wp-content/uploads/2025/08/VE0025141-N-Acetyl-Ser1-Teriparatide.png "[N-Acetyl-Ser1]-Teriparatide"){kind=small}
![[MetO8,18]-Teriparatide](https://veeprho.com/wp-content/uploads/2025/09/VE0025192-MetO8-18-Teriparatide.png "[MetO8,18]-Teriparatide")
