>2kxq_B mol:protein length:20 Smad7 PY motif containing peptide GPLGSELESPPPPYSRYPMD >2kxq_B mol:protein length:20 Smad7 PY motif containing peptide GPLGSELESPPPPYSRYPMD >2kxq_A mol:protein length:90 E3 ubiquitin-protein ligase SMURF2 GPLGGSPPDLPEGYEQRTTQQGQVYFLHTQTGVSTWHDPRVPRDLSNINCEELGPLPPG WEIRNTATGRVYFVDHNNRTTQFTDPRLSAN