>3jb9_j mol:protein length:239 U2 small nuclear ribonucleoprotein A' MRLNAEFLSQVPSFISPLKETELDLRWYQIPIIENLGVLRDVHDAIDFTDNDIRYLGNF PRMKRLQTLLCGNNRITAIAPDIGKVLPNLKTLSLAQNHLQEIADLDPLASCPQLTNLS CIDNPVAQKQYYRLYLIWRIPSLHILDFERVRRNERLRAEEVFGQIQNPTEIASSIMGV KSRVFDLAALVQSHPEANSPITTGYTLTPEEREKIKEAIKNASSIAEINRLEAMLLEGK IPK