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The first step in the utilization of the xenobiotic chlorinated hydrocarbon 1,2-dichloroethane by Xanthobacter autotrophicus is catalyzed by haloalkane dehalogenase (Dh1A). The enzyme hydrolyses 1-haloalkanes to the corresponding alcohols. This allows the organism to grow also on short-chain (C2-C4) 1-chloro-n-alkanes. We have expressed Dh1A in a strain of Pseudomonas that grows on long-chain alcohols and have selected 12 independent mutants that utilize 1-chlorohexane. Six different mutantpmid:8021255 fatcat:pd3zcixiune2jjfy52goksodgq