protein, quick acetyl
The parameter can have the values yes or no.
Most intracellular proteins in eukaryotes (and all prokaryote proteins) have the N-terminal methionine residue removed immediately following translation. In prokaryotes, the new N-terminal residue is left unmodified. In eukaryotes, the new N-terminal residue is often acetylated (H2C2O, +42 Da). If the N-terminal methionine is not removed in eukaryotes, the methionine itself can be acetylated.
When this parameter is yes, these common modifications are checked for the peptides generated from the protein's N-terminus, at all stages of analysis.
see also: protein, quick pyrolidone, refine, potential N-terminus modifications
X! TANDEM API description project