PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 18261462-2 2008 Based on transfection assays, phosphorylation of Runx1 at the three serine residues, Ser249, Ser266, and Ser276, was thought to be important for trans-activation activity of Runx1. Serine 68-74 runt related transcription factor 1 Mus musculus 49-54 18261462-2 2008 Based on transfection assays, phosphorylation of Runx1 at the three serine residues, Ser249, Ser266, and Ser276, was thought to be important for trans-activation activity of Runx1. Serine 68-74 runt related transcription factor 1 Mus musculus 174-179 18261462-3 2008 By using "knock-in" gene targeting, we generated mouse strains expressing mutant Runx1 protein that harbored a combined serine-to-alanine substitution at either of two residues, Ser249/Ser266 or Ser249/Ser276. Serine 120-126 runt related transcription factor 1 Mus musculus 81-86 18261462-6 2008 These results not only challenge the predicted regulation of Runx1 activity by phosphorylation at these serine residues, but also reaffirm the effectiveness of "knock-in" mutagenesis as a powerful tool for addressing the physiological relevance of post-translation modifications. Serine 104-110 runt related transcription factor 1 Mus musculus 61-66