Editing Acetylene (section)

==Natural occurrence==
The energy richness of the C≡C triple bond and the rather high solubility of acetylene in water make it a suitable substrate for bacteria, provided an adequate source is available.<ref>{{Cite journal |last=Akob |first=Denise |date=August 2018 |title=Acetylenotrophy: a hidden but ubiquitous microbial metabolism? |url=https://academic.oup.com/femsec/article/94/8/fiy103/5026170 |access-date=2022-07-28 |journal=FEMS Microbiology Ecology|volume=94 |issue=8 |doi=10.1093/femsec/fiy103 |pmid=29933435 |pmc=7190893 }}</ref> A number of bacteria living on acetylene have been identified. The [[enzyme]] [[acetylene hydratase]] catalyzes the hydration of acetylene to give [[acetaldehyde]]:<ref>{{cite book|first1=Felix|last1=ten Brink|editor=Peter M. H. Kroneck and Martha E. Sosa Torres|title=The Metal-Driven Biogeochemistry of Gaseous Compounds in the Environment|series=Metal Ions in Life Sciences|volume=14|year=2014|publisher=Springer|chapter=Chapter 2. Living on acetylene. A Primordial Energy Source|pages=15–35|doi=10.1007/978-94-017-9269-1_2|pmid=25416389|isbn=978-94-017-9268-4 }}</ref>

:{{chem2|C2H2 + H2O -> CH3CHO}}

Acetylene is a moderately common chemical in the universe, often associated with the atmospheres of [[gas giant]]s.<ref>{{cite press release|publisher=[[W. M. Keck Observatory]] |title=Precursor to Proteins and DNA found in Stellar Disk |date=20 December 2005 |url=http://www.keckobservatory.org/article.php?id=39 |url-status=dead |archive-url=https://web.archive.org/web/20070223211405/http://www.keckobservatory.org/article.php?id=39 |archive-date=2007-02-23 }}</ref> One curious discovery of acetylene is on [[Enceladus]], a moon of [[Saturn]]. Natural acetylene is believed to form from [[Catalysis|catalytic]] decomposition of long-chain hydrocarbons at temperatures of {{convert|1700|K|C F}} and above. Since such temperatures are highly unlikely on such a small distant body, this discovery is potentially suggestive of catalytic reactions within that moon, making it a promising site to search for prebiotic chemistry.<ref>{{cite web|publisher=[[The Planetary Society]] |author =Emily Lakdawalla |title=LPSC: Wednesday afternoon: Cassini at Enceladus |date=17 March 2006 |url=http://www.planetary.org/blog/article/00000498/ |url-status=dead |archive-url=https://web.archive.org/web/20120220053655/http://www.planetary.org/blog/article/00000498/ |archive-date=2012-02-20 }}</ref><ref>{{cite journal|journal=[[Nature (journal)|Nature]] | volume=445 | pages=376–377| date= 25 January 2007| doi = 10.1038/445376b| title= Planetary science: Inside Enceladus|author1=John Spencer |author2=David Grinspoon |pmid=17251967|issue=7126| bibcode=2007Natur.445..376S | s2cid=4427890 | doi-access=free}}</ref>