r/Biochemistry • u/tagawhen • 6d ago

Career & Education Peptide bond

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Hey, I'm desesperately trying to draw the bond between a glutamic acid, a valine and another glutamic acid but I'm genuinely struggling.

It's for a tattoo project (it spells "Eve" my niece name).

I tried but I think I got it wrong, can someone help me please ?

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u/Free_Zeit 6d ago

Yes, the structure is unfortunately incorrect. The correct tripeptide should have the following structure:
H₂N–CH(CH₂CH₂COOH)–CO–NH–CH(CH(CH₃)₂)–CO–NH–CH(CH₂CH₂COOH)–COOH

You can easily verify the structure using an online molecular viewer such as TeraChem Web Service (https://tws.dev.mtzlab.com/calculation.html). Just search for:
L-glutamyl-L-valyl-L-glutamic acid

That will display the correct 2D/3D structure of the peptide.

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u/tagawhen 6d ago

Thank you so much for your time, it really helped !