The enzymes that replicate DNA when a cell divides are not 100% efficient, and a small amount of DNA gets lost from the end of each strand during replication.
复制DNA的酶在细胞分裂时不是100%有效，少量dna在复制过程中从每一串的端部丢失。
2
DNA mismatch repair system could recognize and repair mistakes in process of DNAreplication, guard stability and integrality of genome.
DNA错配修复系统可以识别并纠正DNA复制过程中出现的错误，保证基因组的稳定性和完整性。
3
This research will facilitate to find new DNA-binding protein, and it is important to reveal the molecular mechanisms of DNAreplication and transcription and DNA repair and recombination.