Methods DNAs were isolated from peripheral blood leucocytes of asthma patients and normal individuals and the segment of exon1 and exon3 in BRS-3 gene were obtained using PCR for sequence analysis.

• 方法:抽取哮喘患者及正常人外周血白细胞DNA,PCR法扩增BRS-3外显子1和外显子3,测序及进行序列分析。