<P> Both the RecD and RecB subunits are helicases , i.e. , energy - dependent molecular motors that unwind DNA ( or RNA in the case of other proteins ) . The RecB subunit in addition has a nuclease function . Finally , RecBCD enzyme ( perhaps the RecC subunit ) recognizes a specific sequence in DNA , 5 ' - GCTGGTGG - 3 ' , known as Chi ( sometimes designated with the Greek letter χ ) . </P>
<P> Both the RecD and RecB subunits are helicases , i.e. , energy - dependent molecular motors that unwind DNA ( or RNA in the case of other proteins ) . The RecB subunit in addition has a nuclease function . Finally , RecBCD enzyme ( perhaps the RecC subunit ) recognizes a specific sequence in DNA , 5 ' - GCTGGTGG - 3 ' , known as Chi ( sometimes designated with the Greek letter χ ) . </P>
which subunits of the recbcd trimer show helicase structure and function
which subunits of the recbcd trimer show helicase structure and function
RecD RecB
RecD RecB