AcK residues detected in at least two mammalian proteomic studies are shown whereas, due to the low numbers of studies available, all meK residues in proteins of interest are shown; studies are referenced for each numbered residue. Protein name and amino acid numbering refer to the ‘canonical’ human form of a protein, as annotated in UniProt, unless otherwise stated. Where multiple protein isoforms are named all PTMs apply to all isoforms unless otherwise stated. Where a PTM occurs on a residue in a non-canonical protein isoform the isoform designation is shown in square brackets alongside the residue number (e.g. 1 [1]). § eIF4G1 residue 190 can also correspond to residue 150 [B]/197 [9]; †KHSTAP1 Lys¹⁹⁴ is not conserved from mouse to human. CNBP, cellular nucleic acid binding protein; DAZAP1, DAZ-associated protein 1; DDX1, DEAD-box protein 1; eEF1A1, eukaryotic translation elongation factor 1A1; eIF, eukaryotic initiation factor; eRF3A, eukaryotic translation termination release factor 3A; EWSR1, RNA-binding protein EWS; FUS, RNA-binding protein FUS; hnRNP, heterogeneous nuclear ribonucleoprotein; KSRP, KH type-splicing regulatory protein; PABP1, poly(A)-binding protein 1; PAIP2, PABP-interacting protein 2; PARN, poly(A)-specific ribonuclease; PTB1, polypyrimidine tract-binding protein; SERBP1, plasminogen activator inhibitor 1 RNA-binding protein; TAF15, TATA-binding protein-associated factor 15/RNA-binding protein 56.