Editing Post-translational modification (section)

===Common PTMs by frequency===
In 2011, statistics of each post-translational modification experimentally and putatively detected have been compiled using proteome-wide information from the Swiss-Prot database.<ref>{{cite journal | vauthors = Khoury GA, Baliban RC, Floudas CA | title = Proteome-wide post-translational modification statistics: frequency analysis and curation of the swiss-prot database | journal = Scientific Reports | volume = 1 | issue = 90 | pages = 90 | date = September 2011 | pmid = 22034591 | pmc = 3201773 | doi = 10.1038/srep00090 | bibcode = 2011NatSR...1E..90K }}</ref> The 10 most common experimentally found modifications were as follows:<ref>{{cite web|url=http://selene.princeton.edu/PTMCuration/|title=Proteome-Wide Post-Translational Modification Statistics|website=selene.princeton.edu|access-date=2011-07-22|archive-url=https://web.archive.org/web/20120830234041/http://selene.princeton.edu/PTMCuration/|archive-date=2012-08-30|url-status=dead}}</ref>
{| class="wikitable"
!Frequency
!Modification
|-
|58383
|[[Phosphorylation]]
|-
|6751
|[[Acetylation]]
|-
|5526
|[[N-linked glycosylation]]
|-
|2844
|[[#amidation|Amidation]]
|-
|1619
|[[Hydroxylation]]
|-
|1523
|[[Methylation]]
|-
|1133
|[[O-linked glycosylation]]
|-
|878
|[[Ubiquitin|Ubiquitylation]]
|-
|826
|[[Pyroglutamic acid|Pyrrolidone carboxylic acid]]
|-
|504
|[[Sulfation]]
|}