Objective To investigate the relationship of cystatin C(Cys C) and +73A/G and-82G/C single nucleotide polymorphisms with coronary heart disease(CHD) in Guangxi. Methods Serum levels of Cys C in Zhuang CHD patients,Zhuang healthy subjects,Han CHD patients and Han healthy subjects(100 cases for each group) were determined by immunoturbidimetric assay,and +73A/G and-82G/C single nucleotide polymorphisms were determined by polymerase chain reaction(PCR)-restriction fragment length polymorphism(RFLP). The clinic...