AVA I;AVA I RESTRICTION ENZYME;restriction endonuclease ava I from*anabaena vari;RESTRICTION ENDONUCLEASE AVA I FROM*ANAB AENA VARIAB;ava i from anabaena variabilis;RESTRICTION ENDONUCLEASE AVA I;RESTRICTION ENDONUCLEASES AVA I;Nuclease, restriction endodeoxyribo-, aval