---
OA_type: closed access
_id: '23000'
abstract:
- lang: eng
  text: Ancient viral warfare could be at the root of modern class 1 CRISPR bacterial
    defense systems
article_processing_charge: No
article_type: comment
author:
- first_name: Jack Peter Kelly
  full_name: Bravo, Jack Peter Kelly
  id: 96aecfa5-8931-11ee-af30-aa6a5d6eee0e
  last_name: Bravo
  orcid: 0000-0003-0456-0753
citation:
  ama: Bravo JPK. A viral origin for RNA-guided immunity. <i>Science</i>. 2026;393(6817):1187-1188.
    doi:<a href="https://doi.org/10.1126/science.ael0758">10.1126/science.ael0758</a>
  apa: Bravo, J. P. K. (2026). A viral origin for RNA-guided immunity. <i>Science</i>.
    AAAS. <a href="https://doi.org/10.1126/science.ael0758">https://doi.org/10.1126/science.ael0758</a>
  chicago: Bravo, Jack Peter Kelly. “A Viral Origin for RNA-Guided Immunity.” <i>Science</i>.
    AAAS, 2026. <a href="https://doi.org/10.1126/science.ael0758">https://doi.org/10.1126/science.ael0758</a>.
  ieee: J. P. K. Bravo, “A viral origin for RNA-guided immunity,” <i>Science</i>,
    vol. 393, no. 6817. AAAS, pp. 1187–1188, 2026.
  ista: Bravo JPK. 2026. A viral origin for RNA-guided immunity. Science. 393(6817),
    1187–1188.
  mla: Bravo, Jack Peter Kelly. “A Viral Origin for RNA-Guided Immunity.” <i>Science</i>,
    vol. 393, no. 6817, AAAS, 2026, pp. 1187–88, doi:<a href="https://doi.org/10.1126/science.ael0758">10.1126/science.ael0758</a>.
  short: J.P.K. Bravo, Science 393 (2026) 1187–1188.
corr_author: '1'
das_tickbox: '0'
date_created: 2026-09-27T22:01:52Z
date_published: 2026-09-17T00:00:00Z
date_updated: 2026-10-07T08:10:18Z
day: '17'
department:
- _id: JaBr
doi: 10.1126/science.ael0758
external_id:
  pmid:
  - '42752153'
fulldoi: https://doi.org/10.1126/science.ael0758
intvolume: '       393'
issue: '6817'
language:
- iso: eng
month: '09'
oa_version: None
page: 1187-1188
pmid: 1
publication: Science
publication_identifier:
  eissn:
  - 1095-9203
  issn:
  - 0036-8075
publication_status: published
publisher: AAAS
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: A viral origin for RNA-guided immunity
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 393
year: '2026'
...