@AyrtonLucio @dadatina sería buena si fuera cierta. No es tan sencillo, por múltiples razones, una de ellas es que el SO2 en agua no se transforma en sulfúrico. Dejo un paper con info un poco más seria
Enzyme That Makes You Cry-Crystal Structure of Lachrymatory Factor Synthase from Allium cepa.
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Jul 2019 – Aug 2025Where it's discussed
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News30 articles
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X / Twitter10 posts
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YouTube9 videos
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Reddit3 posts
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Facebook2 posts
AI synopsis
What people are saying
The group mostly agrees that onion tears are a defense mechanism, referencing it directly with comments like 'a defense mechanism' and 'release a certain compound called Lachrymatory Factor.' The tone is educational and curious, often explaining biological processes or referencing additional scientific details, which shows moderate engagement without implying a major breakthrough that would drastically impact society or research.
Most posts support the idea that onions produce a defense chemical causing tears, indicating general agreement with the concepts presented.
The discussions show curiosity about why onions make us cry, suggesting moderate interest in the biological mechanisms.
Participants engage by explaining the defense mechanism and referencing related compounds, indicating active but not deeply technical discussions.
The posts reflect a recognition of the biological significance but do not suggest significant societal or scientific impact from the study, leading to a neutral impact score.
Abstract in brief
- The study explores the enzyme Lachrymatory Factor Synthase (LFS) in onions, which produces a compound that causes eye irritation when chopping, as part of the plant's defense mechanism against microbes and animals.
- Researchers determined the crystal structures of LFS in both its inactive form and when bound to a substrate analogue, revealing that LFS has a helix-grip fold similar to other plant proteins in the START superfamily.
- By comparing these structures and analyzing the active site, the study proposes a catalytic mechanism involving sequential proton transfers and a carbanion intermediate, helping to clarify how onions produce the tear-inducing compound.
Top posts
Most liked on X and BlueskyWhy onions make us cry
@jackthevulture This is a normal reaction for most mammals when eating a raw onion. Onions have a defense mechanism in which they release sulfenic acid when cut or bit in order to prevent being eaten. It's the same reason why you cry when you cut an onion. https://t.co/XZVXCe1JVh
The reason Onions make you cry is because of a defense mechanism they have evolved against predatory animals which would otherwise eat them https://t.co/Vhlrd0ktFj
@tguldener @IchBin_RO @SutherlandPhD https://t.co/1lCHredPZc
@NyxWorldOrder So, when onions are cut they release a certain compound called Lachrymatory Factor. If you can smell the onion, odds are good there's enough to make your eyes wick too. https://t.co/Ty54ZZ41AS
All mentions
Understanding the Enzyme Causing Tears When Cutting Onions
The study explores the enzyme Lachrymatory Factor Synthase in onions, which produces a compound causing eye irritation. Crystal structures reveal its mechanism, involving proton transfers and a carbanion intermediate…
Chemistry Behind Why Onions Make Your Eyes Water
Onions release a sulfur compound when cut, caused by enzymes like alliinase and lachrymatory factor synthase. This reaction irritates the eyes, leading to tears. The process involves a precursor molecule and the…
Understanding Why Onions Make You Cry: Scientific Insights
Understanding the Enzyme Behind Onion Tears and Its Structure
This study explores the enzyme Lachrymatory Factor Synthase in onions, which produces the compound causing eye irritation. Crystal structures reveal how the enzyme works, helping to clarify why onions make us cry and…
Understanding Onion Enzymes That Cause Tears Effectively Explored
This episode covers the enzyme Lachrymatory Factor Synthase in onions, which produces a tear-inducing compound. It discusses the enzyme's structure, function, and role in plant defense, highlighting the catalytic…
Understanding How Onions Make You Cry: The Science of Lachrymatory Enzyme
This video explores the enzyme Lachrymatory Factor Synthase (LFS) in onions, which produces a compound causing eye irritation when chopping. The study reveals the enzyme's structure and its role in the plant's defense…
Does Placing Cut Onion in a Room Cure Cough and Nasal Congestion? Myth or Fact
We explore whether placing a cut onion in a room can relieve respiratory symptoms. Scientific studies analyze the effects of onion compounds on alleviating coughs and nasal congestion, assessing if the airborne sulfur…
Structural Analysis of Onion Enzyme Causing Tears
This video explains how the enzyme Lachrymatory Factor Synthase in onions produces the compound that causes tears when chopping. The study reveals its crystal structure and catalytic mechanism, helping to understand how…
Understanding Onion-Induced Tears and the Enzyme Behind Them
This video explains why onions make us cry, focusing on the enzyme Lachrymatory Factor Synthase that produces the tear-inducing compound as a plant defense mechanism. The study reveals the enzyme's structure and…
RT @thebiozone: Why onions make us cry
RT @thebiozone: Why onions make us cry
Why onions make us cry
The reason Onions make you cry is because of a defense mechanism they have evolved against predatory animals which would otherwise eat them https://t.co/Vhlrd0ktFj
@jackthevulture This is a normal reaction for most mammals when eating a raw onion. Onions have a defense mechanism in which they release sulfenic acid when cut or bit in order to prevent being eaten. It's the same reason why you cry when you cut an onion. https://t.co/XZVXCe1JVh
TIL: The reason Onions make you cry is because of a defense mechanism they have evolved against predatory animals which would otherwise eat them #til #todayilearned https://t.co/wjxowJ5mtZ
@tguldener @IchBin_RO @SutherlandPhD https://t.co/1lCHredPZc
RT @IanVioli: @AyrtonLucio @dadatina sería buena si fuera cierta. No es tan sencillo, por múltiples razones, una de ellas es que el SO2 en…
@AyrtonLucio @dadatina sería buena si fuera cierta. No es tan sencillo, por múltiples razones, una de ellas es que el SO2 en agua no se transforma en sulfúrico. Dejo un paper con info un poco más seria
@NyxWorldOrder So, when onions are cut they release a certain compound called Lachrymatory Factor. If you can smell the onion, odds are good there's enough to make your eyes wick too. https://t.co/Ty54ZZ41AS
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