We also evaluated the phylogenetic placement of Acinetobacter detected in MD 80228 based on both 16S rRNA and rpo-b sequences. The number of rpo-b sequences for Acinetobacter in the database is limited. However, we demonstrated that the MD 80228 transcript-tag clustered with those of Acinetobacter (Fig. 3D ) [37] . Moreover, based on 16S rRNA, we determined that the Acinetobacter species identified in the MD 80228 cDNA library was distinct from all known Acinetobacter and was most closely affiliated with Acinetobacter schindleri (Fig. 3C) .