Amino-acids are the organic acids with amino group in alpha position (alpha-acids). They are the structural units of proteins and involved in many biochemical pathways.
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Are there examples of PTMs that add different chemical groups (and mass) to different amino acids?
I'm talking about this type of post-translational modifications. What I'm interested in is not whether some modifications can only occur on specific amino acids (that's clear), but if the nomenclature ...
