passages.id: split_5_test_1575_passage
passages.type: progene_text
passages.text: To explore the clonality of T cells expressing V beta 6 T-cell receptor , which is determined by the heterogeneity of the complementarity - determining region 3 ( CDR3 ) , V beta 6 - C beta polymerase chain reaction products derived from gingival tissue and peripheral blood of periodontitis patients were analyzed by single - strand conformation polymorphism and nucleotide sequence .