base-excision repair nucleotide-excision repair obsolete short patch mismatch repair system true This term was made obsolete because 'short patch' is a relative statement, often used ambiguously, and does not necessarily represent a process; the processes it can stand for are base excision repair, nucleotide excision repair, transcription-coupled nucleotide excision repair, and mismatch repair. biological_process short patch mismatch repair system GO:0006299 OBSOLETE. The repair of mismatched DNA where the gap to be repaired is only one nucleotide. DNA polymerase is the preferred polymerase in short patch repair, performing gap filling DNA synthesis and removal of the 5'-deoxyribose phosphate of the abasic site.