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Study · Not a test of the peptide alone · 1983

1 result

Picomole analyses of tryptophan by derivatization to 9-hydroxymethyl-beta-carboline.

Inoue S, Tokuyama T, Takai K

Analytical biochemistry1 Jul 1983Cited by 5 (Europe PMC)

PMID6625180 (opens in a new tab)DOI10.1016/0003-2697(83)90036-2 (opens in a new tab)PepBankPUB-06625180
Publisher pagePubMedAsk about this study
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Summary

The text of this summary is not shown here, because the article license does not allow reuse. Read it at the source (opens in a new tab)

Text rights: Publisher copyright. Results still quote short attributed sentences.

Results from this study1

No result from this study comes from a test of the peptide.

Studies that did not test the peptide alone1

In this study, Delta sleep-inducing peptide (DSIP) was a lab tool or a carrier, part of a mix, or the subject of a lab method. These results are not evidence about taking Delta sleep-inducing peptide (DSIP).

  1. 01LabNot a test of Delta sleep-inducing peptide (DSIP) aloneIn vitro (cell-free)Other

    Under the method's conditions, DSIP gave a carboline-derivatized peptide that kept all amino acid residues except tryptophan.

    In plain wordsIn lab tests, a tryptophan assay chemically changed DSIP while keeping its other amino acids.

    Peptide
    Delta sleep-inducing peptide (DSIP)
    Outcome
    Not applicableDerivatization of N-terminal tryptophan peptides including DSIP
    Study

    n: not reported in source

    Pictet-Spengler derivatization of tryptophan
    Outcome group
    Analytical methods and detection · Pharmacology

    Source sentences

    Summary
    Under our conditions, peptides containing N-terminal tryptophan such as Trp-Leu and delta sleep-inducing peptide gave N-(9-hydroxymethyl-beta-carboline-3-carbonyl) peptides which retained all amino acid residues except tryptophan.

    In this study, Delta sleep-inducing peptide (DSIP) was a lab tool or a carrier, part of a mix, or the subject of a lab method. This result is not evidence about taking Delta sleep-inducing peptide (DSIP).

AI wrote and checked these results. AI can make mistakes, so check important results against the source.

Version history

PepBank keeps every version of the data on this study. Status changes from Retraction Watch, Europe PMC and Crossref are listed with their source.

  1. Version 2Current

    10 Oct 2026, 09:43 UTC

    Study results updated

  2. Version 1

    9 Oct 2026, 03:04 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

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