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FEBS Lett. 1999 Oct 1;459(1):33-8.

A gene family encoding glutathione peroxidase homologues in Hordeum vulgare (barley).

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Institute of Biology, Division of Genetics, Humboldt-University, Chausseestr. 117, D-10115, Berlin, Germany.


We have isolated and characterised three barley cDNAs encoding glutathione peroxidase (GPX) homologues, designated HVGPH1, HVGPH2 and HVGPH3. HVGPH1 may represent a cytosolic form of GPX. The structure of the HVGPH2 N-terminal domain is typical for a plastid transit peptide. A potential peroxisomal targeting sequence occurs near the N-terminus of HVGPH3. Transcript levels of HVGPH1 and HVGPH2 were increased in leaves undergoing stress. In contrast, HVGPH3 mRNA accumulation showed a negative response to stress. Our data indicate that the barley genome bears a small gene family encoding GPX homologues differing in their function and cellular localisation.

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