tokens: We showed that Stat3 and Stat3beta were affinity purified using phosphopeptides containing Y704 and Y744 but not by nonphosphorylated peptide analogues or by phosphopeptides containing Y729 and Y764 .
folded_tokens: we show that stat3 and stat3beta be affinity purify use phosphopeptide contain y704 and y744 but not by nonphosphorylated peptide analogue or by phosphopeptide contain y729 and y764 .