Restriction enzymes: commercial source

All endonucleases bellow are isoschizomers
Recognition sequence (?): ATTT'AAAT

SmiI

 Fermentas AB
 SibEnzyme Ltd.
 Takara Shuzo Co. Ltd.
 MRC-Holland

SwaI

 Nippon Gene Co., Ltd.
 Roche Applied Science
 New England Biolabs