mzLib
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Glycan motif
Currently in MetaMorpheus, the N-Glycan motif is 'Nxt, Nxs', where x represents any amino acid. The 'x' cannot be proline for N-Glycan. I haven't found which character people used to represents 'Any amino acid except proline'. I noticed 'J' is used for N-Glycan somewhere.
What about glycine?
maybe we can develop some kind of modification motif syntax, like @bintiibrahim did for protease cleavage specificity? So like X{P} means any amino acid except P
What about glycine?
Glycine should be fine for N-Glycan as far as I know.