FIG. 1.

Nucleotide sequence and deduced amino acid sequence of pepO from Lactobacillus helveticus CNRZ32. A putative Shine-Dalgarno sequence is shown in boldface type and labeled rbs. The −10 and −35 regions are indicated as well as the zinc-metalloprotease motif. The two horizontal arrows indicate the putative transcriptional terminator. The 5′ end of the pepO mRNA is marked with a vertical arrow. Relevant restriction endonuclease sites are shown in boldface type and labeled. The nucleotides between the ≫≪ symbols were deleted in the PepO⁻ derivatives.