Restriction Enzyme Digestion
Restriction Enzyme Digestion Aim: To digest the pUC18 DNA with BamH1 enzyme Principle: Restriction endonucleases are the class of enzymes that are used to cleave DNA at specific sites called Restriction sites. Every restriction enzyme has a specific restriction site at which it cuts a DNA molecule. For example restriction sequence for BamHI is GGATCC (type II restriction enzyme. The most abundantly used restriction enzymes are type II restriction enzymes which cleave at specific restriction site only. These endonucleases function adequately at pH 7.4 but different enzymes vary in their requirements for ionic strength usually provided by sodium chloride and magnesium chloride. It is also advisable to add a reducing agent such as dithiothreitol (DTT) which stabilizes the enzymes and …