Objective: To investigate the association of single nucleotide polymorphisms( SNPs) in CD40 gene( rs1883832 and rs4810485) with type 2 diabetes mellitus( T2DM) in a Yunnan Han population. Methods: Taqman assay was used to genotype rs1883832 and rs4810485 in 343 T2DM patients and 325 healthy individuals. And the allelic and genotypic distribution of the SNPs in T2DM patients and healthy controls were analyzed. Additionally,the haplotypes were constructed and the association of the haplotypes with T2DM was an...