A SNP for guanine insertion/deletion ( G/D ) , the -1607 promoter polymorphism , of the MMP1 gene was found significantly affecting promoter activity and corresponding transcription level .
O O O B-SequenceVariant I-SequenceVariant I-SequenceVariant I-SequenceVariant I-SequenceVariant I-SequenceVariant I-SequenceVariant I-SequenceVariant I-SequenceVariant I-SequenceVariant O O O B-GeneOrGeneProduct O O O O O O O O O O O O