Figure 1From: The 2G allele of promoter region of Matrix metalloproteinase-1 as an essential pre-condition for the early onset of oral squamous cell carcinoma Age distribution of the MMP-1 genotypes in 170 OSCC cases between the ages of 20 and 80 years. The frequency of the 1G/1G genotype is notably low. Note the clear reduction of the 1G/1G and 1G/2G genotype distributions in individuals under the ages of 45 and 35 years, respectively.Back to article page