Cleavage of double-stranded DNA by the intrinsic 3'-5' exonuclease activity of DNA polymerase B1 from the hyperthermophilic archaeon Sulfolobus solfataricus at high temperature ) W% A& Q- U: j4 c9 P$ N# J& L) W 5 h* \! p0 {: A+ E6 K( Q: Ihttp://www.ncbi.nlm.nih.gov/pubmed/14769474