||Bacteria Staphylococcus aureus
||Allen LM, Hodskinson MR, Sayers JR. Active site substitutions delineate distinct classes of eubacterial flap endonuclease. Biochem J. 2008 Nov 11. link PubMed ID19000038
||Using a standard spectrophotometric assay, we quantified the exonucleolytic activity. the specific activity for T5FEN, calculated in a previous study (610 units µg-1)  was similar to that reported here (420±10 units µg-1), The specific activity of SaFEN (90±5 units µg-1) was approximately fivefold lower than that of T5FEN, equivalent to a turnover rate of 106 min -1.
||the activity of E. coli FEN is approximately three-fold less. see bion 102587