Skip to content

Study · Not a test of the peptide alone · 1988

2 results

Enzymatic synthesis of delta sleep-inducing peptide.

Sakina K, Kawazura K, Morihara K

International journal of peptide and protein research1 Feb 1988Cited by 5 (Europe PMC)

PMID3366553 (opens in a new tab)DOI10.1111/j.1399-3011.1988.tb00030.x (opens in a new tab)PepBankPUB-03366553
Publisher pagePubMedAsk about this study
Jump to 2 results

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 study2

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

Studies that did not test the peptide alone2

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

    DSIP was assembled enzymatically from three tripeptide fragments, with papain- or alpha-chymotrypsin-mediated peptide bond formation.

    In plain wordsIn lab chemistry, DSIP was built with enzymes from three small peptide pieces.

    Peptide
    Delta sleep-inducing peptide (DSIP)
    Outcome
    Not applicableEnzymatic synthesis of DSIP from three tripeptide fragments
    Study

    n: not reported in source

    Enzymatic peptide synthesis
    Outcome group
    Receptor activity and mechanism · Pharmacology

    Source sentences

    Summary
    The delta sleep-inducing peptide was assembled enzymatically from three tripeptide fragments. All the peptide bonds were prepared by either papain- or alpha-chymotrypsin-mediated synthesis.

    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).

  2. 02LabNot a test of Delta sleep-inducing peptide (DSIP) aloneIn vitro (cell-free)Other

    Enzymatically and chemically prepared DSIP showed no obvious differences.

    In plain wordsIn lab chemistry, DSIP made with enzymes showed no obvious difference from DSIP made by chemical methods.

    Peptide
    Delta sleep-inducing peptide (DSIP)
    Outcome
    No significant changeEnzymatic versus chemical preparation of DSIP
    Study

    n: not reported in source

    Enzymatic peptide synthesis
    Comparator
    Chemically prepared DSIP
    Outcome group
    Receptor activity and mechanism · Pharmacology

    Source sentences

    Summary
    Comparison of enzymatic and chemical preparations showed no obvious differences.

    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.

Publication types

PepBank is a research reference. Talk to a doctor before you use any peptide.