. "PubMed"^^ . "17209045"^^ . "Ras/ERK1/2-mediated STAT3 Ser727 phosphorylation by familial medullary thyroid carcinoma-associated RET mutants induces full activation of STAT3 and is required for c-fos promoter activation, cell mitogenicity, and transformation."^^ . "http://www.phosphosite.org/curatedInfoAction.do?record=2698000"^^ . "2007"^^ .