A novel dihydrofolate reductase cassette inserted in an integron borne on a Tn21-like element.

Abstract

In this study, a 498-bp dhfrXII gene coding for trimethoprim resistance was found inserted in a cassette-like manner in the recombinationally active locus, the integron, borne on a transposon Tn21-like element. The dhfrXII cassette is distinct from those cassettes earlier observed in integrons and was found here upstream of two similarly inserted cassettes… (More)

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