Name	Info	Provider	Link
	free resource	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0896-6273(05)00022-X
PhosphoSitePlus® - comprehensive post-translational modification resource	free resource	PhosphoSitePlus	https://www.phosphosite.org/referenceSearchSubmitAction.action?from=0&queryId=-1&pubMedIds=15694326