Neoschizomer

Neoschizomers are restriction enzymes that recognize the same nucleotide sequence as their prototype but cleave at a different site. In some special applications this is a very helpful feature. 
For example:Prototype MaeII A^CGT produces DNA fragments with a 2-base 5' extension
Neoschizomer TaiI ACGT^ produces DNA fragments with a 4-base 3' extension
Prototype ApaI GGGCC^C produces DNA fragments with a 4-base 3' extension
Neoschizomer Bsp120I G^GGCCC produces DNA fragments with a 4-base 5' extension
There are also other pairs of neoschizomers.
Neoschizomers are a subset of isoschizomers.