Plasmids 101: Methylation and Restriction Enzymes
Type
Blog Post
...there, although other restriction sites (including other XbaI sites not preceded by GA or followed by ...occurring restriction modification systems that prokaryotes use to protect themselves from foreign DNA. The...digesting DNA. Why? Well, even though Dam methylation sites are not specifically associated with any restriction...systems, their sequences may overlap with restriction sites, inhibiting enzymes such as ClaI or XbaI, or, conversely...as DpnI require methylation at their recognition sites in order to efficiently cleave DNA. DpnI is often...mutation into your plasmid of interest by PCR generates mutated plasmids with no methylation (there are...commonly used in the lab do not have recognition sites that could overlap with a methylation site. The ...