Abstract: The coding sequence of Blattella germanica ubiquitin gene was cloned and determined (GenBank Accession No. AY501003). The length of this opening reading-frame (ORF) is 228 bp, encoding a protein with molecular weight of 8.47 kD and isoelectric point of 5.73.Multiple sequence alignment indicated that B. germanica ubiquitin was very similar to the homologous proteins of other eukaryotic species and shared more than 94% identity with other eukaryotic ubiquitins at amino acid level.

Key words: Blattella germanica, ubiquitin gene, cloning, sequence analysis