31. Primer extension offers an alternative to a nuclease protection assay ( S1 nuclease mapping ) for quantifying and mapping RNA transcripts. 32. Although not the only nuclease involved, ERCC1 XPF is required for ICL repair during several phases of the cell cycle. 33. "' Crab duplex-specific nuclease "'is a nuclease derived from SNP detection and RNA normalization. 34. "' Crab duplex-specific nuclease "'is a nuclease derived from SNP detection and RNA normalization. 35. Nuclease digestion assays have confirmed that the eye phenotypes are indicative of the chromatin environment surrounding the P element insertion site.36. At a replication fork arrested at an ICL, FAN1 nuclease action can catalyze incisions in the double-stranded region. 37. Surveyor nuclease is part of a family of mismatch-specific endonucleases that were discovered in celery ( CEL nucleases ). 38. Nuclease resistance protects the downstream 3'UTR RNA fragment from degradation and is essential for virus-induced cytopathicity and pathogenicity.39. Their results led Hannon and his colleagues to suggest RNAi degrades target mRNA through a'sequence-specific nuclease activity '. 40. Nuclease S1 can then be used to cut the DNA in single-stranded regions ( anywhere with a methylated adenine ).