Source: E.coli. MW :42.59kD. Recombinant Human Flap Endonuclease 1 is produced by our E.coli expression system and the target gene encoding Met1-Lys380 is expressed. Flap Endonuclease 1 (FEN1) is a member of the XPG/RAD2 endonuclease family. During DNA r