Objective To study the distribution characteristics of S100B gene rs9722 and rs2186358 polymorphism in Guangxi population,and to compare the distribution differences among different ethnics. Methods Polymerase chain reaction-single base extension( SBE-PCR) and DNA sequencing were used to detect the genotype of S100B gene among 398 individuals in Guangxi,China. The results were compared with the reported frequencies in four other populations( Hap Map-CEU,Hap Map-YRI,Hap Map-ASW and Hap Map-HCB) from Human Ge...