The application discloses application of an MT-2A
gene SNP locus in detecting susceptibility to heavy-
metal poisoning. The SNP locus is the 178th
nucleotide of MT-2A genes, wherein G is greater than A, the sequence of the MT-2A genes is as shown in SEQ ID No.7. G and A of the SNP locus are significantly different between a case group and a control group, G is a susceptible
allele or high-
risk allele of
cadmium poisoning, A is a non-susceptible
allele or low-
risk allele of the
cadmium poisoning, so that the base type of the locus is detected and the
genotype of the locus is determined, and thenthe susceptibility to the heavy-
metal (such as
cadmium) poisoning or risks of the heavy-
metal poisoning can be detected, patients with the heavy-
metal poisoning can be screened, susceptible genes ofthe heavy-
metal poisoning can be identified or assisted, and
single nucleotide polymorphism associated with the heavy-
metal poisoning or
metabolism can be detected. The application and product provided by the invention are of great value in identifying the
susceptible population of the heavy-metal poisoning, thereby reasonably preventing the heavy-metal poisoning.