Post-translational Modifications That Modulate Enzyme Activity, Volume 626 in the Methods in Enzymology series, continues the legacy of this premier serial with quality chapters authored by leaders in the field. Updated chapters include Crosstalk between cellular metabolism and histone acetylation, Isolation of protein complexes and modifications that regulate transcriptional machinery, High-throughput phosphoproteome mapping through multiplexed mass spectrometry, Differentiation of D and L epimerization in proteins, Biochemical analysis of protein arginylation, Site-specific Determination of lysine acetylation stoichiometries on the proteome-scale, Genomic and biochemical analysis of RNA post-transcriptional modifications, Isolation and characterization of glycosylated (neuro)peptides, and more.