passages.id: split_6_test_3338_passage
passages.type: progene_text
passages.text: GAD65 530 - 543 ( p530 ) - reactive T cells preferentially utilize the Vbeta4 , Dbeta2.1 and Jbeta2.7 gene segments , with a CDR3 that is characterized by a triad of amino acids , DWG , preceded by a polar residue .