Prediction of NMR peptides with unknown residues named "MAS", what does this mean to the model?

06 April 2024 0 2K Report

#Seeking help from structural biologist

I am going to analyze modeling tools (AF2, RoseTTAFold2, ESMFold, etc) performance and benchmark the accuracy and so on. While doing RoseTTAFold2 modeling I have experienced something unique in it. It predict few residue in peptides with MAS residue. It is not any non-standard amino acid. What does this MAS residues implies here?

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