Classic Subcloning Basic Steps for Subcloning Subcloning is a basic procedure in molecular biology required to move inserts from one vector to another to gain the desired functionality to study your insert. Essentially all subcloning reactions proceed the same way as illustrated in the figure below. You release and purify your insert from the parent vector, ligate this insert into a prepared destination vector, transform this ligation reaction into competent bacterial cells. Then you screen the transformed cells for the insert. This Subcloning Notebook will guide you through every step in the process. Destination Parent Vector Vector Dephosphorylation reduces the chance of vector self-ligation Release insert from Digest vector parent vector with to accept insert to virtually zero. restriction digests Dephosphorylation Gel isolation band of interest is a practical Gel-purify Chapters insert Purify vector necessity 1 and 2 in subcloning. You get the fragment Gel isolation of vector Generated you need. by PCR reduces background by Ligate insert to vector eliminating uncut vector from the transformation. Transform Chapter 3 Screen Miniprep Digest 1 2 3 4 –Vector –Insert Chapter 4 4497TA www.promega.com •
[email protected] 3 Classic Subcloning Subcloning Strategy See the Compatible Ends Before you begin your subcloning, you need to know: The restriction enzyme Table on page 61 for (RE) sites available for subcloning in your parent vector multiple cloning region (or in the insert if you need to digest the insert); the RE sites available a listing of overhangs in the destination vector multiple cloning region (MCR); and if these same compatible with sites also occur in your insert.