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Subreddit Argues for Nine Hours About a Single Letter in a Peptide Sequence
Satire. Everything below is a joke about peptide culture. All characters are fictional and nothing here is advice.
A thread that began with “quick question” entered its ninth hour Tuesday, with 4,000 comments and a heated disagreement over whether a certain letter was a V or a Y.
Key takeaways
- The joke: nine hours, one letter.
- The point: a single residue changes the molecule.
- Check sequences against mass and source.
The thread
“It’s obviously V,” wrote one participant. “It’s obviously Y,” wrote another. The original poster, who had made a typo, was not available for comment.
Why it is not entirely silly
Valine and tyrosine differ by 64 mass units and a very different ring. Swap one and the peptide is a different substance. KPV, for example, is three letters, and each one counts.
The serious point
- Verify sequences against a primary source.
- Check the measured mass against the calculated mass.
- Learn the codes with our sequence guide.
Related reading
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For laboratory research use only. Not for human or veterinary use, and not intended to diagnose, treat, cure or prevent any condition. This article is educational and is not medical advice.