Informationoncommerciallyavailablerestrictionendonucleasesisfrom: Note EnzymesproducedbyFermentasareshowninblue.Enzymesinparentheseshavedifferentcleavagespecificities.Isoschizomerswithdifferentsensitivitytomethylationareindicatedby"m".DpnIrequiresthepresenceofN6-methyladeninewithintherecognitionsequenceGATC. Singlelettercode:R=GorA;Y=CorT;W=AorT;M=AorC;K=GorT;S=CorG;H=A,CorT;V=A,CorG;B=C,GorT;D=A,GorT;N=G,A,TorC.