Protein and Peptide Letters

Our screening flags Protein and Peptide Letters as a possible predatory venue because its publisher appears on Beall's archive, which has been frozen since 2017. Treat this as a prompt to check carefully, not a verdict: verify against DOAJ and Think. Check. Submit before submitting.

Per our venue index, Protein and Peptide Letters appears in: Scopus, Web of Science, PubMed. Index membership changes over time — confirm on the index's own site before relying on it.

Papers in Protein and Peptide Letters are cited about 4.6 times each within two years of publication, and Scimago places it in Q3, with an h-index of 74. Those are the open equivalents: the Clarivate Journal Impact Factor is a proprietary metric we neither compute nor license, so we show the two-year citation rate and Scimago quartile instead — they answer the same question of how heavily the journal is cited. A citation rate is a property of a field as much as of a journal.

In the Scimago Journal Rank 2025 edition, Protein and Peptide Letters is Q3 in all 3 of its subject categories. By category: Structural Biology: Q3, #38 of 51; Biochemistry: Q3, #295 of 449; Medicine (miscellaneous): Q3, #1,393 of 2,517. Quartiles split the journals in a subject category into four equal groups by SJR, so Q1 is the most-cited quarter and Q4 the least; Protein and Peptide Letters is cited about 4.6 times per paper over two years, with an h-index of 74.

The Web of Science quartile comes from Clarivate's Journal Citation Reports (JCR), a proprietary product we neither license nor compute — so we cannot state a JCR quartile for Protein and Peptide Letters. The open equivalent is its Scimago quartile, Q3, derived from Scopus citation data. Because JCR ranks against Web of Science and Scimago against Scopus, the two can differ, so check Clarivate's site directly if you need the JCR quartile specifically.

Our index records its access status as "hybrid". Where this is derived from publisher-level signals rather than works-level data it is a heuristic, so confirm on the journal's own site — particularly if an article processing charge matters to you.