A NADPH regenerating system using a new, protein engineered formate de
hydrogenase (FDH) is investigated. The new enzyme is the first known N
AD(P)H dependent FDH. It can be successfully employed in synthesis vii
th other enzymes requiring a NADPH regeneration. All advantages of the
known NAD(H) dependent FDH's in these enzyme coupled synthesis can no
w be transferred to NADP(H) dependent systems.