In this report, we describe the isolation of a 4020‐bp genomic PstI fragment of Desulfovibrio gigas harboring the aldehyde oxido‐reductase gene. The aldehyde oxido‐reductase gene spans 2718 bp of genomic DNA and codes for a protein with 906 residues. The protein sequence shows an average 52% (± 1.5%) similarity to xanthine dehydrogenase from different organisms. The codon usage of the aldehyde oxidoreductase is almost identical to a calculated codon usage of the Desulfovibrio bacteria.

We have determined the amino acid sequence of a small copper protein isolated from cucumber peelings. This cupredaxin contains I37 amhlo acids including a pyroglutamatc as the first r&due. The N-terminal 110 amino acid-long domain shows 30-378 identity to 2 other cupredoxins, stellacyanin and cucumber basic blue protein. A unique feature of this protein is a 27 amino acid-long C-terminal domain rich in 4-hydroxyproline and serinc nnd resembling certnin plant cell wall proteins. The prolines in this domain arc hydroxylated to a different exten: depcsiding on the surrounding sequence.

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